From 97cd23d8ec68f0f55d4f3037ce82565ff045303b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 17:58:04 +0200
Subject: [PATCH 01/15] feat(postgresql): move dynamic modules to default
 output

Backport https://github.com/NixOS/nixpkgs/commit/5547322a0c01dd30a7e0111adc1f02bafbbd6ebc
---
 nix/cargo-pgrx/buildPgrxExtension.nix         |  1 -
 nix/ext/tests/wrappers.nix                    |  7 ---
 nix/postgresql/generic.nix                    | 45 +++----------------
 .../patches/paths-for-split-outputs.patch     | 11 +++++
 .../specify_pkglibdir_at_runtime.patch        | 28 ------------
 5 files changed, 17 insertions(+), 75 deletions(-)
 delete mode 100644 nix/postgresql/patches/specify_pkglibdir_at_runtime.patch

diff --git a/nix/cargo-pgrx/buildPgrxExtension.nix b/nix/cargo-pgrx/buildPgrxExtension.nix
index adfee55ec..16e47ced8 100644
--- a/nix/cargo-pgrx/buildPgrxExtension.nix
+++ b/nix/cargo-pgrx/buildPgrxExtension.nix
@@ -160,7 +160,6 @@ let
       cargo-pgrx pgrx stop all
 
       mv $out/${postgresql}/* $out
-      mv $out/${postgresql.lib}/* $out
       rm -rf $out/nix
 
       ${maybeLeaveBuildAndTestSubdir}
diff --git a/nix/ext/tests/wrappers.nix b/nix/ext/tests/wrappers.nix
index 54cc63944..ceae1b647 100644
--- a/nix/ext/tests/wrappers.nix
+++ b/nix/ext/tests/wrappers.nix
@@ -13,7 +13,6 @@ let
         name = "postgresql-${majorVersion}-${pname}";
         paths = [
           postgresql
-          postgresql.lib
           (installedExtension majorVersion)
         ];
         passthru = {
@@ -21,17 +20,11 @@ let
           lib = pkg;
           withPackages = _: pkg;
         };
-        nativeBuildInputs = [ pkgs.makeWrapper ];
         pathsToLink = [
           "/"
           "/bin"
           "/lib"
         ];
-        postBuild = ''
-          wrapProgram $out/bin/postgres --set NIX_PGLIBDIR $out/lib
-          wrapProgram $out/bin/pg_ctl --set NIX_PGLIBDIR $out/lib
-          wrapProgram $out/bin/pg_upgrade --set NIX_PGLIBDIR $out/lib
-        '';
       };
     in
     pkg;
diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 7cdf79ea5..7fa1b2ee1 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -185,7 +185,6 @@ let
           )
           ./patches/less-is-more.patch
           ./patches/paths-for-split-outputs.patch
-          ./patches/specify_pkglibdir_at_runtime.patch
           ./patches/paths-with-postgresql-suffix.patch
 
           (replaceVars ./patches/locale-binary-path.patch {
@@ -216,28 +215,18 @@ let
 
       installTargets = [ "install-world-bin" ];
 
-      postPatch =
-        ''
-          # Hardcode the path to pgxs so pg_config returns the path in $out
-          substituteInPlace "src/common/config_info.c" --subst-var out
-        ''
-        + lib.optionalString jitSupport ''
-          # Force lookup of jit stuff in $out instead of $lib
-          substituteInPlace src/backend/jit/jit.c --replace pkglib_path \"$out/lib\"
-          substituteInPlace src/backend/jit/llvm/llvmjit.c --replace pkglib_path \"$out/lib\"
-          substituteInPlace src/backend/jit/llvm/llvmjit_inline.cpp --replace pkglib_path \"$out/lib\"
-        '';
+      postPatch = ''
+        substituteInPlace "src/Makefile.global.in" --subst-var out
+        # Hardcode the path to pgxs so pg_config returns the path in $out
+        substituteInPlace "src/common/config_info.c" --subst-var out
+      '';
 
       postInstall =
         ''
-          moveToOutput "lib/pgxs" "$out" # looks strange, but not deleting it
           moveToOutput "lib/libpgcommon*.a" "$out"
           moveToOutput "lib/libpgport*.a" "$out"
           moveToOutput "lib/libecpg*" "$out"
 
-          # Prevent a retained dependency on gcc-wrapper.
-          substituteInPlace "$out/lib/pgxs/src/Makefile.global" --replace ${stdenv'.cc}/bin/ld ld
-
           if [ -z "''${dontDisableStatic:-}" ]; then
             # Remove static libraries in case dynamic are available.
             for i in $out/lib/*.a $lib/lib/*.a; do
@@ -250,11 +239,6 @@ let
           fi
         ''
         + lib.optionalString jitSupport ''
-          # Move the bitcode and libllvmjit.so library out of $lib; otherwise, every client that
-          # depends on libpq.so will also have libLLVM.so in its closure too, bloating it
-          moveToOutput "lib/bitcode" "$out"
-          moveToOutput "lib/llvmjit*" "$out"
-
           # In the case of JIT support, prevent a retained dependency on clang-wrapper
           substituteInPlace "$out/lib/pgxs/src/Makefile.global" --replace ${stdenv'.cc}/bin/clang clang
           nuke-refs $out/lib/llvmjit_types.bc $(find $out/lib/bitcode -type f)
@@ -318,7 +302,7 @@ let
             import ./ext newSelf newSuper;
 
           withPackages = postgresqlWithPackages {
-            inherit makeWrapper buildEnv;
+            inherit buildEnv;
             postgresql = this;
           } this.pkgs;
 
@@ -382,7 +366,6 @@ let
   postgresqlWithPackages =
     {
       postgresql,
-      makeWrapper,
       buildEnv,
     }:
     pkgs: f:
@@ -390,29 +373,13 @@ let
       name = "postgresql-and-plugins-${postgresql.version}";
       paths = f pkgs ++ [
         postgresql
-        postgresql.lib
         #TODO RM postgresql.man   # in case user installs this into environment
       ];
-      nativeBuildInputs = [ makeWrapper ];
 
-      # We include /bin to ensure the $out/bin directory is created, which is
-      # needed because we'll be removing the files from that directory in postBuild
-      # below. See #22653
       pathsToLink = [
         "/"
-        "/bin"
       ];
 
-      # Note: the duplication of executables is about 4MB size.
-      # So a nicer solution was patching postgresql to allow setting the
-      # libdir explicitly.
-      postBuild = ''
-        mkdir -p $out/bin
-        rm $out/bin/{pg_config,postgres,pg_ctl}
-        cp --target-directory=$out/bin ${postgresql}/bin/{postgres,pg_config,pg_ctl}
-        wrapProgram $out/bin/postgres --set NIX_PGLIBDIR $out/lib
-      '';
-
       passthru.version = postgresql.version;
       passthru.psqlSchema = postgresql.psqlSchema;
     };
diff --git a/nix/postgresql/patches/paths-for-split-outputs.patch b/nix/postgresql/patches/paths-for-split-outputs.patch
index 2134f7e81..fca7aa10f 100644
--- a/nix/postgresql/patches/paths-for-split-outputs.patch
+++ b/nix/postgresql/patches/paths-for-split-outputs.patch
@@ -9,3 +9,14 @@
  	strlcat(path, "/pgxs/src/makefiles/pgxs.mk", sizeof(path));
  	cleanup_path(path);
  	configdata[i].setting = pstrdup(path);
+--- a/src/Makefile.global.in
++++ b/src/Makefile.global.in
+@@ -116,7 +116,7 @@ endif
+ 
+ libdir := @libdir@
+ 
+-pkglibdir = $(libdir)
++pkglibdir = @out@/lib
+ ifeq "$(findstring pgsql, $(pkglibdir))" ""
+ ifeq "$(findstring postgres, $(pkglibdir))" ""
+ override pkglibdir := $(pkglibdir)/postgresql
diff --git a/nix/postgresql/patches/specify_pkglibdir_at_runtime.patch b/nix/postgresql/patches/specify_pkglibdir_at_runtime.patch
deleted file mode 100644
index b94fc9efc..000000000
--- a/nix/postgresql/patches/specify_pkglibdir_at_runtime.patch
+++ /dev/null
@@ -1,28 +0,0 @@
---- a/src/port/path.c
-+++ b/src/port/path.c
-@@ -714,7 +714,11 @@
- void
- get_lib_path(const char *my_exec_path, char *ret_path)
- {
--	make_relative_path(ret_path, LIBDIR, PGBINDIR, my_exec_path);
-+	char const * const nix_pglibdir = getenv("NIX_PGLIBDIR");
-+	if(nix_pglibdir == NULL)
-+		make_relative_path(ret_path, LIBDIR, PGBINDIR, my_exec_path);
-+	else
-+		make_relative_path(ret_path, nix_pglibdir, PGBINDIR, my_exec_path);
- }
- 
- /*
-@@ -723,7 +727,11 @@
- void
- get_pkglib_path(const char *my_exec_path, char *ret_path)
- {
--	make_relative_path(ret_path, PKGLIBDIR, PGBINDIR, my_exec_path);
-+	char const * const nix_pglibdir = getenv("NIX_PGLIBDIR");
-+	if(nix_pglibdir == NULL)
-+		make_relative_path(ret_path, PKGLIBDIR, PGBINDIR, my_exec_path);
-+	else
-+		make_relative_path(ret_path, nix_pglibdir, PGBINDIR, my_exec_path);
- }
- 
- /*

From 472804b7557f1b9fa41d488def396a06c470ece4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 21:40:22 +0200
Subject: [PATCH 02/15] feat(postgresql): move libecpq to lib output

Backport https://github.com/NixOS/nixpkgs/commit/77977286d80c9bfb77cbf80989d41c59d66dccf8
---
 nix/postgresql/generic.nix                    | 63 ++++++++++++++-----
 .../patches/export-dynamic-darwin-15-.patch   | 13 ++++
 2 files changed, 62 insertions(+), 14 deletions(-)
 create mode 100644 nix/postgresql/patches/export-dynamic-darwin-15-.patch

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 7fa1b2ee1..7939b6c85 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -57,6 +57,7 @@ let
       nukeReferences,
       patchelf,
       llvmPackages,
+      overrideCC,
 
       # PL/Python
       pythonSupport ? false,
@@ -82,7 +83,16 @@ let
 
       pname = "postgresql";
 
-      stdenv' = if jitSupport then llvmPackages.stdenv else stdenv;
+      stdenv' =
+        if jitSupport then
+          overrideCC llvmPackages.stdenv (
+            llvmPackages.stdenv.cc.override {
+              # LLVM bintools are not used by default, but are needed to make -flto work below.
+              bintools = llvmPackages.bintools;
+            }
+          )
+        else
+          stdenv;
     in
     stdenv'.mkDerivation (finalAttrs: {
       inherit version;
@@ -100,20 +110,31 @@ let
             inherit hash;
           };
 
+      __structuredAttrs = true;
+
       hardeningEnable = lib.optionals (!stdenv'.cc.isClang) [ "pie" ];
 
       outputs = [
         "out"
         "lib"
+        "doc"
+        "man"
       ];
       setOutputFlags = false; # $out retains configureFlags :-/
+      outputChecks.lib = {
+        disallowedReferences = [
+          "out"
+          "doc"
+          "man"
+        ];
+      };
 
       buildInputs =
         [
           zlib
           readline
           openssl
-          (libxml2.override { python = python3; })
+          (libxml2.override { enableHttp = true; })
           icu
         ]
         ++ lib.optionals (olderThan "13") [ libxcrypt ]
@@ -150,11 +171,20 @@ let
 
       separateDebugInfo = true;
 
-      buildFlags = [ "world-bin" ];
-
-      # Makes cross-compiling work when xml2-config can't be executed on the host.
-      # Fixed upstream in https://github.com/postgres/postgres/commit/0bc8cebdb889368abdf224aeac8bc197fe4c9ae6
-      env.NIX_CFLAGS_COMPILE = lib.optionalString (olderThan "13") "-I${libxml2.dev}/include/libxml2";
+      buildFlags = [ "world" ];
+
+      # libpgcommon.a and libpgport.a contain all paths returned by pg_config and are linked
+      # into all binaries. However, almost no binaries actually use those paths. The following
+      # flags will remove unused sections from all shared libraries and binaries - including
+      # those paths. This avoids a lot of circular dependency problems with different outputs,
+      # and allows splitting them cleanly.
+      env.CFLAGS =
+        "-fdata-sections -ffunction-sections"
+        + (if stdenv'.cc.isClang then " -flto" else " -fmerge-constants -Wl,--gc-sections")
+        + lib.optionalString (stdenv'.isDarwin && jitSupport) " -fuse-ld=lld"
+        # Makes cross-compiling work when xml2-config can't be executed on the host.
+        # Fixed upstream in https://github.com/postgres/postgres/commit/0bc8cebdb889368abdf224aeac8bc197fe4c9ae6
+        + lib.optionalString (olderThan "13") " -I${libxml2.dev}/include/libxml2";
 
       configureFlags =
         [
@@ -173,7 +203,10 @@ let
         ++ lib.optionals gssSupport [ "--with-gssapi" ]
         ++ lib.optionals pythonSupport [ "--with-python" ]
         ++ lib.optionals jitSupport [ "--with-llvm" ]
-        ++ lib.optionals stdenv'.isLinux [ "--with-pam" ];
+        ++ lib.optionals stdenv'.isLinux [ "--with-pam" ]
+        # This could be removed once the upstream issue is resolved:
+        # https://postgr.es/m/flat/427c7c25-e8e1-4fc5-a1fb-01ceff185e5b%40technowledgy.de
+        ++ lib.optionals (stdenv'.isDarwin && atLeast "16") [ "LDFLAGS_EX_BE=-Wl,-export_dynamic" ];
 
       patches =
         [
@@ -211,9 +244,12 @@ let
         )
         ++ lib.optionals stdenv'.isLinux [
           (if atLeast "13" then ./patches/socketdir-in-run-13+.patch else ./patches/socketdir-in-run.patch)
+        ]
+        ++ lib.optionals (stdenv'.isDarwin && olderThan "16") [
+          ./patches/export-dynamic-darwin-15-.patch
         ];
 
-      installTargets = [ "install-world-bin" ];
+      installTargets = [ "install-world" ];
 
       postPatch = ''
         substituteInPlace "src/Makefile.global.in" --subst-var out
@@ -225,7 +261,9 @@ let
         ''
           moveToOutput "lib/libpgcommon*.a" "$out"
           moveToOutput "lib/libpgport*.a" "$out"
-          moveToOutput "lib/libecpg*" "$out"
+
+          # Prevent a retained dependency on gcc-wrapper.
+          substituteInPlace "$out/lib/pgxs/src/Makefile.global" --replace ${stdenv'.cc}/bin/ld ld
 
           if [ -z "''${dontDisableStatic:-}" ]; then
             # Remove static libraries in case dynamic are available.
@@ -356,10 +394,7 @@ let
         # resulting LLVM IR isn't platform-independent this doesn't give you much.
         # In fact, I tried to test the result in a VM-test, but as soon as JIT was used to optimize
         # a query, postgres would coredump with `Illegal instruction`.
-        broken =
-          (jitSupport && stdenv.hostPlatform != stdenv.buildPlatform)
-          # Allmost all tests fail FATAL errors for v12 and v13
-          || (jitSupport && stdenv.hostPlatform.isMusl && olderThan "14");
+        broken = jitSupport && !stdenv.hostPlatform.canExecute stdenv.buildPlatform;
       };
     });
 
diff --git a/nix/postgresql/patches/export-dynamic-darwin-15-.patch b/nix/postgresql/patches/export-dynamic-darwin-15-.patch
new file mode 100644
index 000000000..fa0f4be4d
--- /dev/null
+++ b/nix/postgresql/patches/export-dynamic-darwin-15-.patch
@@ -0,0 +1,13 @@
+See https://postgr.es/m/eb249761-56e2-4e42-a2c5-b9ae18c1ca1f%40technowledgy.de
+---
+--- a/src/makefiles/Makefile.darwin
++++ b/src/makefiles/Makefile.darwin
+@@ -5,6 +5,8 @@ DLSUFFIX = .so
+ # env var name to use in place of LD_LIBRARY_PATH
+ ld_library_path_var = DYLD_LIBRARY_PATH
+ 
++export_dynamic = -Wl,-export_dynamic
++
+ ifdef PGXS
+   BE_DLLLIBS = -bundle_loader $(bindir)/postgres
+ else

From dd06610c85a7b9fdb3782bc4f0295396cf08f2e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 22:22:08 +0200
Subject: [PATCH 03/15] feat(postgresql): split dev output

Backport https://github.com/NixOS/nixpkgs/commit/435f51c37faf74375134dfbd7c5a4560da2a9ea7
---
 nix/postgresql/generic.nix                    | 87 ++++++++++++++-----
 .../patches/empty-pg-config-view-15+.patch    | 54 ++++++++++++
 .../patches/empty-pg-config-view.patch        | 50 +++++++++++
 .../patches/paths-for-split-outputs.patch     |  2 +-
 4 files changed, 168 insertions(+), 25 deletions(-)
 create mode 100644 nix/postgresql/patches/empty-pg-config-view-15+.patch
 create mode 100644 nix/postgresql/patches/empty-pg-config-view.patch

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 7939b6c85..bd74b1dbd 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -25,6 +25,7 @@ let
       replaceVars,
       darwin,
       linux-pam,
+      removeReferencesTo,
       #orioledb specific
       perl,
       bison,
@@ -116,17 +117,42 @@ let
 
       outputs = [
         "out"
-        "lib"
+        "dev"
         "doc"
+        "lib"
         "man"
       ];
-      setOutputFlags = false; # $out retains configureFlags :-/
+      outputChecks.out = {
+        disallowedReferences = [
+          "dev"
+          "doc"
+          "man"
+        ];
+        disallowedRequisites =
+          [
+            stdenv'.cc
+          ]
+          ++ (map lib.getDev (builtins.filter (drv: drv ? "dev") finalAttrs.buildInputs))
+          ++ lib.optionals jitSupport [
+            llvmPackages.llvm.out
+          ];
+      };
+
       outputChecks.lib = {
         disallowedReferences = [
           "out"
+          "dev"
           "doc"
           "man"
         ];
+        disallowedRequisites =
+          [
+            stdenv'.cc
+          ]
+          ++ (map lib.getDev (builtins.filter (drv: drv ? "dev") finalAttrs.buildInputs))
+          ++ lib.optionals jitSupport [
+            llvmPackages.llvm.out
+          ];
       };
 
       buildInputs =
@@ -160,6 +186,7 @@ let
         [
           makeWrapper
           pkg-config
+          removeReferencesTo
         ]
         ++ lib.optionals jitSupport [
           llvmPackages.llvm.dev
@@ -192,7 +219,6 @@ let
           "--with-libxml"
           "--with-icu"
           "--sysconfdir=/etc"
-          "--libdir=$(lib)/lib"
           "--with-system-tzdata=${tzdata}/share/zoneinfo"
           "--enable-debug"
           (lib.optionalString systemdSupport' "--with-systemd")
@@ -216,6 +242,12 @@ let
             else
               ./patches/relative-to-symlinks.patch
           )
+          (
+            if atLeast "15" then
+              ./patches/empty-pg-config-view-15+.patch
+            else
+              ./patches/empty-pg-config-view.patch
+          )
           ./patches/less-is-more.patch
           ./patches/paths-for-split-outputs.patch
           ./patches/paths-with-postgresql-suffix.patch
@@ -253,21 +285,38 @@ let
 
       postPatch = ''
         substituteInPlace "src/Makefile.global.in" --subst-var out
-        # Hardcode the path to pgxs so pg_config returns the path in $out
-        substituteInPlace "src/common/config_info.c" --subst-var out
+        # Hardcode the path to pgxs so pg_config returns the path in $dev
+        substituteInPlace "src/common/config_info.c" --subst-var dev
       '';
 
       postInstall =
         ''
-          moveToOutput "lib/libpgcommon*.a" "$out"
-          moveToOutput "lib/libpgport*.a" "$out"
-
-          # Prevent a retained dependency on gcc-wrapper.
-          substituteInPlace "$out/lib/pgxs/src/Makefile.global" --replace ${stdenv'.cc}/bin/ld ld
+          moveToOutput "bin/ecpg" "$dev"
+          moveToOutput "lib/pgxs" "$dev"
+
+          # Pretend pg_config is located in $out/bin to return correct paths, but
+          # actually have it in -dev to avoid pulling in all other outputs.
+          moveToOutput "bin/pg_config" "$dev"
+          # To prevent a "pg_config: could not find own program executable" error, we fake
+          # pg_config in the default output.
+          cat << EOF > "$out/bin/pg_config" && chmod +x "$out/bin/pg_config"
+          #!${stdenv'.shell}
+          echo The real pg_config can be found in the -dev output.
+          exit 1
+          EOF
+          wrapProgram "$dev/bin/pg_config" --argv0 "$out/bin/pg_config"
+
+          # postgres exposes external symbols get_pkginclude_path and similar. Those
+          # can't be stripped away by --gc-sections/LTO, because they could theoretically
+          # be used by dynamically loaded modules / extensions. To avoid circular dependencies,
+          # references to -dev, -doc and -man are removed here. References to -lib must be kept,
+          # because there is a realistic use-case for extensions to locate the /lib directory to
+          # load other shared modules.
+          remove-references-to -t "$dev" -t "$doc" -t "$man" "$out/bin/postgres"
 
           if [ -z "''${dontDisableStatic:-}" ]; then
             # Remove static libraries in case dynamic are available.
-            for i in $out/lib/*.a $lib/lib/*.a; do
+            for i in $lib/lib/*.a; do
               name="$(basename "$i")"
               ext="${stdenv'.hostPlatform.extensions.sharedLibrary}"
               if [ -e "$lib/lib/''${name%.a}$ext" ] || [ -e "''${i%.a}$ext" ]; then
@@ -275,22 +324,14 @@ let
               fi
             done
           fi
+          # The remaining static libraries are libpgcommon.a, libpgport.a and related.
+          # Those are only used when building e.g. extensions, so go to $dev.
+          moveToOutput "lib/*.a" "$dev"
         ''
         + lib.optionalString jitSupport ''
           # In the case of JIT support, prevent a retained dependency on clang-wrapper
-          substituteInPlace "$out/lib/pgxs/src/Makefile.global" --replace ${stdenv'.cc}/bin/clang clang
           nuke-refs $out/lib/llvmjit_types.bc $(find $out/lib/bitcode -type f)
 
-          # Stop out depending on the default output of llvm
-          substituteInPlace $out/lib/pgxs/src/Makefile.global \
-            --replace ${llvmPackages.llvm.out}/bin "" \
-            --replace '$(LLVM_BINPATH)/' ""
-
-          # Stop out depending on the -dev output of llvm
-          substituteInPlace $out/lib/pgxs/src/Makefile.global \
-            --replace ${llvmPackages.llvm.dev}/bin/llvm-config llvm-config \
-            --replace -I${llvmPackages.llvm.dev}/include ""
-
           ${lib.optionalString (!stdenv'.isDarwin) ''
             # Stop lib depending on the -dev output of llvm
             rpath=$(patchelf --print-rpath $out/lib/llvmjit.so)
@@ -309,8 +350,6 @@ let
       # autodetection doesn't seem to able to find this, but it's there.
       checkTarget = "check";
 
-      disallowedReferences = [ stdenv'.cc ];
-
       passthru =
         let
           this = self.callPackage generic args;
diff --git a/nix/postgresql/patches/empty-pg-config-view-15+.patch b/nix/postgresql/patches/empty-pg-config-view-15+.patch
new file mode 100644
index 000000000..c83e6964c
--- /dev/null
+++ b/nix/postgresql/patches/empty-pg-config-view-15+.patch
@@ -0,0 +1,54 @@
+Empty the pg_config system information view. This view keeps references to
+several -dev outputs, which we want to avoid to keep closure size down.
+
+The alternative to this patch would be to nuke references across the board,
+but this will also affect the output of the pg_config utility. By emptying
+the view only, we keep the pg_config binary intact. It resides in the -dev
+output, so it's fine to have all those references there.
+
+---
+--- a/src/backend/utils/misc/pg_config.c
++++ b/src/backend/utils/misc/pg_config.c
+@@ -32,20 +32,5 @@ pg_config(PG_FUNCTION_ARGS)
+ 	/* initialize our tuplestore */
+ 	InitMaterializedSRF(fcinfo, 0);
+ 
+-	configdata = get_configdata(my_exec_path, &configdata_len);
+-	for (i = 0; i < configdata_len; i++)
+-	{
+-		Datum		values[2];
+-		bool		nulls[2];
+-
+-		memset(values, 0, sizeof(values));
+-		memset(nulls, 0, sizeof(nulls));
+-
+-		values[0] = CStringGetTextDatum(configdata[i].name);
+-		values[1] = CStringGetTextDatum(configdata[i].setting);
+-
+-		tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);
+-	}
+-
+ 	return (Datum) 0;
+ }
+--- a/src/test/regress/expected/sysviews.out
++++ b/src/test/regress/expected/sysviews.out
+@@ -29,7 +29,7 @@ select name, ident, parent, level, total_bytes >= free_bytes
+ (1 row)
+ 
+ -- At introduction, pg_config had 23 entries; it may grow
+-select count(*) > 20 as ok from pg_config;
++select count(*) = 0 as ok from pg_config;
+  ok 
+ ----
+  t
+--- a/src/test/regress/sql/sysviews.sql
++++ b/src/test/regress/sql/sysviews.sql
+@@ -18,7 +18,7 @@ select name, ident, parent, level, total_bytes >= free_bytes
+   from pg_backend_memory_contexts where level = 0;
+ 
+ -- At introduction, pg_config had 23 entries; it may grow
+-select count(*) > 20 as ok from pg_config;
++select count(*) = 0 as ok from pg_config;
+ 
+ -- We expect no cursors in this test; see also portals.sql
+ select count(*) = 0 as ok from pg_cursors;
diff --git a/nix/postgresql/patches/empty-pg-config-view.patch b/nix/postgresql/patches/empty-pg-config-view.patch
new file mode 100644
index 000000000..98e4b8151
--- /dev/null
+++ b/nix/postgresql/patches/empty-pg-config-view.patch
@@ -0,0 +1,50 @@
+Empty the pg_config system information view. This view keeps references to
+several -dev outputs, which we want to avoid to keep closure size down.
+
+The alternative to this patch would be to nuke references across the board,
+but this will also affect the output of the pg_config utility. By emptying
+the view only, we keep the pg_config binary intact. It resides in the -dev
+output, so it's fine to have all those references there.
+
+---
+--- a/src/backend/utils/misc/pg_config.c
++++ b/src/backend/utils/misc/pg_config.c
+@@ -69,16 +69,6 @@ pg_config(PG_FUNCTION_ARGS)
+ 	/* initialize our tuplestore */
+ 	tupstore = tuplestore_begin_heap(true, false, work_mem);
+ 
+-	configdata = get_configdata(my_exec_path, &configdata_len);
+-	for (i = 0; i < configdata_len; i++)
+-	{
+-		values[0] = configdata[i].name;
+-		values[1] = configdata[i].setting;
+-
+-		tuple = BuildTupleFromCStrings(attinmeta, values);
+-		tuplestore_puttuple(tupstore, tuple);
+-	}
+-
+ 	/*
+ 	 * no longer need the tuple descriptor reference created by
+ 	 * TupleDescGetAttInMetadata()
+--- a/src/test/regress/expected/sysviews.out
++++ b/src/test/regress/expected/sysviews.out
+@@ -20,7 +20,7 @@ select count(*) >= 0 as ok from pg_available_extensions;
+ (1 row)
+ 
+ -- At introduction, pg_config had 23 entries; it may grow
+-select count(*) > 20 as ok from pg_config;
++select count(*) = 0 as ok from pg_config;
+  ok 
+ ----
+  t
+--- a/src/test/regress/sql/sysviews.sql
++++ b/src/test/regress/sql/sysviews.sql
+@@ -13,7 +13,7 @@ select count(*) >= 0 as ok from pg_available_extension_versions;
+ select count(*) >= 0 as ok from pg_available_extensions;
+ 
+ -- At introduction, pg_config had 23 entries; it may grow
+-select count(*) > 20 as ok from pg_config;
++select count(*) = 0 as ok from pg_config;
+ 
+ -- We expect no cursors in this test; see also portals.sql
+ select count(*) = 0 as ok from pg_cursors;
diff --git a/nix/postgresql/patches/paths-for-split-outputs.patch b/nix/postgresql/patches/paths-for-split-outputs.patch
index fca7aa10f..46164bba2 100644
--- a/nix/postgresql/patches/paths-for-split-outputs.patch
+++ b/nix/postgresql/patches/paths-for-split-outputs.patch
@@ -4,7 +4,7 @@
  	i++;
 
  	configdata[i].name = pstrdup("PGXS");
-+	strlcpy(path, "@out@/lib", sizeof(path));
++	strlcpy(path, "@dev@/lib", sizeof(path));
 -	get_pkglib_path(my_exec_path, path);
  	strlcat(path, "/pgxs/src/makefiles/pgxs.mk", sizeof(path));
  	cleanup_path(path);

From d8ad1b09e4d1825822dfa2e06a9ff2b01e1d1c76 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 22:35:57 +0200
Subject: [PATCH 04/15] feat(postgresql): remove references to llvm-dev on
 darwin as well

Backport https://github.com/NixOS/nixpkgs/commit/94d432ce88b6dff272a17b4ed15dbefca14097fc
---
 nix/postgresql/generic.nix | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index bd74b1dbd..f6890ad14 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -56,7 +56,6 @@ let
       # JIT
       jitSupport,
       nukeReferences,
-      patchelf,
       llvmPackages,
       overrideCC,
 
@@ -74,6 +73,8 @@ let
       lz4Enabled = atLeast "14";
       zstdEnabled = atLeast "15";
 
+      dlSuffix = if olderThan "16" then ".so" else stdenv.hostPlatform.extensions.sharedLibrary;
+
       systemdSupport' =
         if enableSystemd == null then
           systemdSupport
@@ -137,7 +138,6 @@ let
             llvmPackages.llvm.out
           ];
       };
-
       outputChecks.lib = {
         disallowedReferences = [
           "out"
@@ -191,7 +191,6 @@ let
         ++ lib.optionals jitSupport [
           llvmPackages.llvm.dev
           nukeReferences
-          patchelf
         ];
 
       enableParallelBuilding = true;
@@ -332,13 +331,8 @@ let
           # In the case of JIT support, prevent a retained dependency on clang-wrapper
           nuke-refs $out/lib/llvmjit_types.bc $(find $out/lib/bitcode -type f)
 
-          ${lib.optionalString (!stdenv'.isDarwin) ''
-            # Stop lib depending on the -dev output of llvm
-            rpath=$(patchelf --print-rpath $out/lib/llvmjit.so)
-            nuke-refs -e $out $out/lib/llvmjit.so
-            # Restore the correct rpath
-            patchelf $out/lib/llvmjit.so --set-rpath "$rpath"
-          ''}
+          # Stop lib depending on the -dev output of llvm
+          remove-references-to -t ${llvmPackages.llvm.dev} "$out/lib/llvmjit${dlSuffix}"
         '';
 
       postFixup = lib.optionalString (!stdenv'.isDarwin && stdenv'.hostPlatform.libc == "glibc") ''
@@ -356,13 +350,13 @@ let
           jitToggle = this.override { jitSupport = !jitSupport; };
         in
         {
+          inherit dlSuffix;
+
           psqlSchema = lib.versions.major version;
 
           withJIT = if jitSupport then this else jitToggle;
           withoutJIT = if jitSupport then jitToggle else this;
 
-          dlSuffix = if olderThan "16" then ".so" else stdenv.hostPlatform.extensions.sharedLibrary;
-
           pkgs =
             let
               scope = {

From 79d408a2c21d075c8de45dd6c67c145bccd07fe3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 22:40:36 +0200
Subject: [PATCH 05/15] feat(postgresql): refactor removal of references in
 bitcode files

Backport https://github.com/NixOS/nixpkgs/commit/dfde86f73857f575ae79785c1da9496599b38b2c
---
 nix/postgresql/generic.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index f6890ad14..4884fbb81 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -328,8 +328,8 @@ let
           moveToOutput "lib/*.a" "$dev"
         ''
         + lib.optionalString jitSupport ''
-          # In the case of JIT support, prevent a retained dependency on clang-wrapper
-          nuke-refs $out/lib/llvmjit_types.bc $(find $out/lib/bitcode -type f)
+          # In the case of JIT support, prevent useless dependencies on header files
+          find "$out/lib" -iname '*.bc' -type f -exec nuke-refs '{}' +
 
           # Stop lib depending on the -dev output of llvm
           remove-references-to -t ${llvmPackages.llvm.dev} "$out/lib/llvmjit${dlSuffix}"

From 8c1949b12d50d79e1bcdb2476a5cbaf12d1de2c1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 22:44:42 +0200
Subject: [PATCH 06/15] feat(postgresql): refactor to simplify condition

Backport https://github.com/NixOS/nixpkgs/commit/73cb40366df17b3224970ae80e64527687bd5023
---
 nix/postgresql/generic.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 4884fbb81..fd12f422f 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -335,7 +335,7 @@ let
           remove-references-to -t ${llvmPackages.llvm.dev} "$out/lib/llvmjit${dlSuffix}"
         '';
 
-      postFixup = lib.optionalString (!stdenv'.isDarwin && stdenv'.hostPlatform.libc == "glibc") ''
+      postFixup = lib.optionalString stdenv'.hostPlatform.isGnu ''
         # initdb needs access to "locale" command from glibc.
         wrapProgram $out/bin/initdb --prefix PATH ":" ${glibc.bin}/bin
       '';

From 171882c3851e056dc882db56f7458ebb625b4b82 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:01:44 +0200
Subject: [PATCH 07/15] feat(postgresql): use systemdLibs

Backport https://github.com/NixOS/nixpkgs/commit/2f9c580c6f48b8bdea941188b85389601c1ad867
---
 nix/postgresql/generic.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index fd12f422f..1a5b56689 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -16,7 +16,7 @@ let
       icu,
       lz4,
       zstd,
-      systemd,
+      systemdLibs,
       libossp_uuid,
       pkg-config,
       libxml2,
@@ -36,7 +36,8 @@ let
       libxslt,
 
       # This is important to obtain a version of `libpq` that does not depend on systemd.
-      systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd && !stdenv.hostPlatform.isStatic,
+      systemdSupport ?
+        lib.meta.availableOn stdenv.hostPlatform systemdLibs && !stdenv.hostPlatform.isStatic,
       enableSystemd ? null,
       gssSupport ? with stdenv.hostPlatform; !isWindows && !isStatic,
 
@@ -167,7 +168,7 @@ let
         ++ lib.optionals jitSupport [ llvmPackages.llvm ]
         ++ lib.optionals lz4Enabled [ lz4 ]
         ++ lib.optionals zstdEnabled [ zstd ]
-        ++ lib.optionals systemdSupport' [ systemd ]
+        ++ lib.optionals systemdSupport' [ systemdLibs ]
         ++ lib.optionals pythonSupport [ python3 ]
         ++ lib.optionals gssSupport [ libkrb5 ]
         ++ lib.optionals stdenv'.isLinux [ linux-pam ]

From cfb7e31c28b6ee1666e0b9a979e21ed3993f8e77 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:08:49 +0200
Subject: [PATCH 08/15] feat(postgresql): postgresql_jit.pkgs.postgis: fix
 build on darwin

Backport of upstream commit https://github.com/NixOS/nixpkgs/commit/cd85a62bc257b4177823359a20986deddaa4dc0b
---
 nix/postgresql/generic.nix | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 1a5b56689..1502f8167 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -87,7 +87,7 @@ let
       pname = "postgresql";
 
       stdenv' =
-        if jitSupport then
+        if jitSupport && !stdenv.cc.isClang then
           overrideCC llvmPackages.stdenv (
             llvmPackages.stdenv.cc.override {
               # LLVM bintools are not used by default, but are needed to make -flto work below.
@@ -208,7 +208,6 @@ let
       env.CFLAGS =
         "-fdata-sections -ffunction-sections"
         + (if stdenv'.cc.isClang then " -flto" else " -fmerge-constants -Wl,--gc-sections")
-        + lib.optionalString (stdenv'.isDarwin && jitSupport) " -fuse-ld=lld"
         # Makes cross-compiling work when xml2-config can't be executed on the host.
         # Fixed upstream in https://github.com/postgres/postgres/commit/0bc8cebdb889368abdf224aeac8bc197fe4c9ae6
         + lib.optionalString (olderThan "13") " -I${libxml2.dev}/include/libxml2";

From d7b816246f07edea3d0ce03a3a7c52b4d7a28cb3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:22:02 +0200
Subject: [PATCH 09/15] feat(postgresql): improve fake pg_config in default
 output

Backport of upstream commit https://github.com/NixOS/nixpkgs/commit/0c477676412564bd2d5dadc37cf245fe4259f4d9
---
 nix/postgresql/generic.nix  | 17 +++++++++--------
 nix/postgresql/pg_config.sh | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 8 deletions(-)
 create mode 100644 nix/postgresql/pg_config.sh

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 1502f8167..bc853cb65 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -26,6 +26,7 @@ let
       darwin,
       linux-pam,
       removeReferencesTo,
+      writeShellApplication,
       #orioledb specific
       perl,
       bison,
@@ -96,6 +97,11 @@ let
           )
         else
           stdenv;
+
+      pg_config = writeShellApplication {
+        name = "pg_config";
+        text = builtins.readFile ./pg_config.sh;
+      };
     in
     stdenv'.mkDerivation (finalAttrs: {
       inherit version;
@@ -294,15 +300,10 @@ let
           moveToOutput "lib/pgxs" "$dev"
 
           # Pretend pg_config is located in $out/bin to return correct paths, but
-          # actually have it in -dev to avoid pulling in all other outputs.
+          # actually have it in -dev to avoid pulling in all other outputs. See the
+          # pg_config.sh script's comments for details.
           moveToOutput "bin/pg_config" "$dev"
-          # To prevent a "pg_config: could not find own program executable" error, we fake
-          # pg_config in the default output.
-          cat << EOF > "$out/bin/pg_config" && chmod +x "$out/bin/pg_config"
-          #!${stdenv'.shell}
-          echo The real pg_config can be found in the -dev output.
-          exit 1
-          EOF
+          install -c -m 755 "${pg_config}"/bin/pg_config "$out/bin/pg_config"
           wrapProgram "$dev/bin/pg_config" --argv0 "$out/bin/pg_config"
 
           # postgres exposes external symbols get_pkginclude_path and similar. Those
diff --git a/nix/postgresql/pg_config.sh b/nix/postgresql/pg_config.sh
new file mode 100644
index 000000000..9538b213f
--- /dev/null
+++ b/nix/postgresql/pg_config.sh
@@ -0,0 +1,35 @@
+# The real pg_config needs to be in the same path as the "postgres" binary
+# to return proper paths. However, we want it in the -dev output to prevent
+# cyclic references and to prevent blowing up the runtime closure. Thus, we
+# have wrapped -dev/bin/pg_config to fake its argv0 to be in the default
+# output. Unfortunately, pg_config tries to be smart and tries to find itself -
+# which will then fail with:
+#   pg_config: could not find own program executable
+# To counter this, we're creating *this* fake pg_config script and put it into
+# the default output. The real pg_config is happy.
+# Some extensions, e.g. timescaledb, use the reverse logic and look for pg_config
+# in the same path as the "postgres" binary to support multi-version-installs.
+# Thus, they will end up calling this script during build, even though the real
+# pg_config would be available on PATH, provided by nativeBuildInputs. To help
+# this case, we're redirecting the call to pg_config to the one found in PATH,
+# iff we can be convinced that it belongs to our -dev output.
+
+# Avoid infinite recursion
+if [[ ! -v PG_CONFIG_CALLED ]]; then
+    # compares "path of *this* script" with "path, which pg_config on PATH believes it is in"
+    if [[ "$(readlink -f -- "$0")" == "$(PG_CONFIG_CALLED=1 pg_config --bindir)/pg_config" ]]; then
+        # The pg_config in PATH returns the same bindir that we're actually called from.
+        # This means that the pg_config in PATH is the one from "our" -dev output.
+        # This happens when the -dev output has been put in native build
+        # inputs and allows us to call the real pg_config without referencing
+        # the -dev output itself.
+        exec pg_config "$@"
+    fi
+fi
+
+# This will happen in one of these cases:
+# - *this* script is the first on PATH
+# - np pg_config on PATH
+# - some other pg_config on PATH, not from our -dev output
+echo The real pg_config can be found in the -dev output.
+exit 1

From 1534f076b29d12c92db39e66be8d148989e8ecfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:35:56 +0200
Subject: [PATCH 10/15] feat(postgresql): replace `stdenv.is` with
 `stdenv.hostPlatform.is`

Backport upstream commit https://github.com/NixOS/nixpkgs/commit/e0464e47880a69896f0fb1810f00e0de469f770a
---
 nix/postgresql/generic.nix | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index bc853cb65..f4c7d1808 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -177,8 +177,8 @@ let
         ++ lib.optionals systemdSupport' [ systemdLibs ]
         ++ lib.optionals pythonSupport [ python3 ]
         ++ lib.optionals gssSupport [ libkrb5 ]
-        ++ lib.optionals stdenv'.isLinux [ linux-pam ]
-        ++ lib.optionals (!stdenv'.isDarwin) [ libossp_uuid ]
+        ++ lib.optionals stdenv'.hostPlatform.isLinux [ linux-pam ]
+        ++ lib.optionals (!stdenv'.hostPlatform.isDarwin) [ libossp_uuid ]
         ++ lib.optionals (isOrioleDB || (lib.versionAtLeast version "17")) [
           perl
           bison
@@ -227,17 +227,19 @@ let
           "--with-system-tzdata=${tzdata}/share/zoneinfo"
           "--enable-debug"
           (lib.optionalString systemdSupport' "--with-systemd")
-          (if stdenv'.isDarwin then "--with-uuid=e2fs" else "--with-ossp-uuid")
+          (if stdenv'.hostPlatform.isDarwin then "--with-uuid=e2fs" else "--with-ossp-uuid")
         ]
         ++ lib.optionals lz4Enabled [ "--with-lz4" ]
         ++ lib.optionals zstdEnabled [ "--with-zstd" ]
         ++ lib.optionals gssSupport [ "--with-gssapi" ]
         ++ lib.optionals pythonSupport [ "--with-python" ]
         ++ lib.optionals jitSupport [ "--with-llvm" ]
-        ++ lib.optionals stdenv'.isLinux [ "--with-pam" ]
+        ++ lib.optionals stdenv'.hostPlatform.isLinux [ "--with-pam" ]
         # This could be removed once the upstream issue is resolved:
         # https://postgr.es/m/flat/427c7c25-e8e1-4fc5-a1fb-01ceff185e5b%40technowledgy.de
-        ++ lib.optionals (stdenv'.isDarwin && atLeast "16") [ "LDFLAGS_EX_BE=-Wl,-export_dynamic" ];
+        ++ lib.optionals (stdenv'.hostPlatform.isDarwin && atLeast "16") [
+          "LDFLAGS_EX_BE=-Wl,-export_dynamic"
+        ];
 
       patches =
         [
@@ -279,10 +281,10 @@ let
           # Using fetchurl instead of fetchpatch on purpose: https://github.com/NixOS/nixpkgs/issues/240141
           map fetchurl (lib.attrValues muslPatches)
         )
-        ++ lib.optionals stdenv'.isLinux [
+        ++ lib.optionals stdenv'.hostPlatform.isLinux [
           (if atLeast "13" then ./patches/socketdir-in-run-13+.patch else ./patches/socketdir-in-run.patch)
         ]
-        ++ lib.optionals (stdenv'.isDarwin && olderThan "16") [
+        ++ lib.optionals (stdenv'.hostPlatform.isDarwin && olderThan "16") [
           ./patches/export-dynamic-darwin-15-.patch
         ];
 
@@ -341,7 +343,7 @@ let
         wrapProgram $out/bin/initdb --prefix PATH ":" ${glibc.bin}/bin
       '';
 
-      doCheck = !stdenv'.isDarwin;
+      doCheck = !stdenv'.hostPlatform.isDarwin;
       # autodetection doesn't seem to able to find this, but it's there.
       checkTarget = "check";
 

From 8daecd429e297f6cabe98097d339f9e190a8eaa0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:40:39 +0200
Subject: [PATCH 11/15] feat(postgresql): run full test-suite during checkPhase

Backport upstream commit https://github.com/NixOS/nixpkgs/commit/149aa98ce4396b972e85bb6953c8c7ccc959c6cd
---
 nix/postgresql/generic.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index f4c7d1808..690825f98 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -345,7 +345,7 @@ let
 
       doCheck = !stdenv'.hostPlatform.isDarwin;
       # autodetection doesn't seem to able to find this, but it's there.
-      checkTarget = "check";
+      checkTarget = "check-world";
 
       passthru =
         let

From b1727c903ee3b155c76c4881c57fa792c57ebf16 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:53:05 +0200
Subject: [PATCH 12/15] feat(postgresql): use newer libuuid instead of
 ossp-uuid

Backport upstream commit https://github.com/NixOS/nixpkgs/commit/de4ad2a6ace9f2428804cf515bbc5600aa340981
---
 nix/postgresql/generic.nix | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 690825f98..63a48a6d0 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -17,7 +17,7 @@ let
       lz4,
       zstd,
       systemdLibs,
-      libossp_uuid,
+      libuuid,
       pkg-config,
       libxml2,
       tzdata,
@@ -169,6 +169,7 @@ let
           openssl
           (libxml2.override { enableHttp = true; })
           icu
+          libuuid
         ]
         ++ lib.optionals (olderThan "13") [ libxcrypt ]
         ++ lib.optionals jitSupport [ llvmPackages.llvm ]
@@ -178,7 +179,6 @@ let
         ++ lib.optionals pythonSupport [ python3 ]
         ++ lib.optionals gssSupport [ libkrb5 ]
         ++ lib.optionals stdenv'.hostPlatform.isLinux [ linux-pam ]
-        ++ lib.optionals (!stdenv'.hostPlatform.isDarwin) [ libossp_uuid ]
         ++ lib.optionals (isOrioleDB || (lib.versionAtLeast version "17")) [
           perl
           bison
@@ -227,7 +227,7 @@ let
           "--with-system-tzdata=${tzdata}/share/zoneinfo"
           "--enable-debug"
           (lib.optionalString systemdSupport' "--with-systemd")
-          (if stdenv'.hostPlatform.isDarwin then "--with-uuid=e2fs" else "--with-ossp-uuid")
+          "--with-uuid=e2fs"
         ]
         ++ lib.optionals lz4Enabled [ "--with-lz4" ]
         ++ lib.optionals zstdEnabled [ "--with-zstd" ]

From 7176b6d629c779d41cc87407171eef1e9a048f61 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Mon, 21 Jul 2025 23:58:38 +0200
Subject: [PATCH 13/15] feat(postgresql): simplify systemdSupport default value

Backport upstream commit https://github.com/NixOS/nixpkgs/commit/a7fdf2256ae643876035c863dc9bbd3fd95101da
---
 nix/postgresql/generic.nix | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index 63a48a6d0..a426f06f0 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -36,9 +36,7 @@ let
       docbook_xsl_ns,
       libxslt,
 
-      # This is important to obtain a version of `libpq` that does not depend on systemd.
-      systemdSupport ?
-        lib.meta.availableOn stdenv.hostPlatform systemdLibs && !stdenv.hostPlatform.isStatic,
+      systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemdLibs,
       enableSystemd ? null,
       gssSupport ? with stdenv.hostPlatform; !isWindows && !isStatic,
 

From 6050efbd592ca442c9404702455e3af92a32ca2a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Tue, 22 Jul 2025 00:01:14 +0200
Subject: [PATCH 14/15] feat(postgresql): remove deprecated enableSystemd
 override

Backport upstream commit https://github.com/NixOS/nixpkgs/commit/6178e9bd3c37f1398f92ee433fb76e32e50ed874
---
 nix/postgresql/generic.nix | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index a426f06f0..b7dc3bf57 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -37,7 +37,6 @@ let
       libxslt,
 
       systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemdLibs,
-      enableSystemd ? null,
       gssSupport ? with stdenv.hostPlatform; !isWindows && !isStatic,
 
       # for postgresql.pkgs
@@ -75,12 +74,6 @@ let
 
       dlSuffix = if olderThan "16" then ".so" else stdenv.hostPlatform.extensions.sharedLibrary;
 
-      systemdSupport' =
-        if enableSystemd == null then
-          systemdSupport
-        else
-          (lib.warn "postgresql: argument enableSystemd is deprecated, please use systemdSupport instead." enableSystemd);
-
       isOrioleDB = (builtins.match "[0-9][0-9]_.*" version) != null;
 
       pname = "postgresql";
@@ -173,7 +166,7 @@ let
         ++ lib.optionals jitSupport [ llvmPackages.llvm ]
         ++ lib.optionals lz4Enabled [ lz4 ]
         ++ lib.optionals zstdEnabled [ zstd ]
-        ++ lib.optionals systemdSupport' [ systemdLibs ]
+        ++ lib.optionals systemdSupport [ systemdLibs ]
         ++ lib.optionals pythonSupport [ python3 ]
         ++ lib.optionals gssSupport [ libkrb5 ]
         ++ lib.optionals stdenv'.hostPlatform.isLinux [ linux-pam ]
@@ -224,7 +217,7 @@ let
           "--sysconfdir=/etc"
           "--with-system-tzdata=${tzdata}/share/zoneinfo"
           "--enable-debug"
-          (lib.optionalString systemdSupport' "--with-systemd")
+          (lib.optionalString systemdSupport "--with-systemd")
           "--with-uuid=e2fs"
         ]
         ++ lib.optionals lz4Enabled [ "--with-lz4" ]

From 26dd9f404bcd6584e9ff828115ea43e9412b8255 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Roche?= <jfroche@pyxel.be>
Date: Tue, 22 Jul 2025 21:26:25 +0200
Subject: [PATCH 15/15] wip

---
 nix/postgresql/generic.nix | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/nix/postgresql/generic.nix b/nix/postgresql/generic.nix
index b7dc3bf57..788a6e50f 100644
--- a/nix/postgresql/generic.nix
+++ b/nix/postgresql/generic.nix
@@ -119,13 +119,11 @@ let
         "dev"
         "doc"
         "lib"
-        "man"
       ];
       outputChecks.out = {
         disallowedReferences = [
           "dev"
           "doc"
-          "man"
         ];
         disallowedRequisites =
           [
@@ -140,8 +138,6 @@ let
         disallowedReferences = [
           "out"
           "dev"
-          "doc"
-          "man"
         ];
         disallowedRequisites =
           [
@@ -195,7 +191,7 @@ let
 
       separateDebugInfo = true;
 
-      buildFlags = [ "world" ];
+      buildFlags = [ "world-bin" ];
 
       # libpgcommon.a and libpgport.a contain all paths returned by pg_config and are linked
       # into all binaries. However, almost no binaries actually use those paths. The following
@@ -279,7 +275,7 @@ let
           ./patches/export-dynamic-darwin-15-.patch
         ];
 
-      installTargets = [ "install-world" ];
+      installTargets = [ "install-world-bin" ];
 
       postPatch = ''
         substituteInPlace "src/Makefile.global.in" --subst-var out
@@ -305,7 +301,8 @@ let
           # references to -dev, -doc and -man are removed here. References to -lib must be kept,
           # because there is a realistic use-case for extensions to locate the /lib directory to
           # load other shared modules.
-          remove-references-to -t "$dev" -t "$doc" -t "$man" "$out/bin/postgres"
+          remove-references-to -t "$dev" -t "$doc" "$out/bin/postgres"
+          remove-references-to -t "$dev" -t "$doc" "$out/bin/pg_rewind"
 
           if [ -z "''${dontDisableStatic:-}" ]; then
             # Remove static libraries in case dynamic are available.