Remove references to snap-server in backend

Author: maralorn

default.nix

@@ -210,7 +210,15 @@ in rec {
 
   serverExe = backend: frontend: assets: optimizationLevel: externjs: version:
     let
-      exeBackend = if profiling then backend else haskellLib.justStaticExecutables backend;
+      exeBackend = if profiling then backend else haskellLib.overrideCabal
+         (haskellLib.justStaticExecutables backend)
+          (_: {
+            # Newer nixpkgs version make sure that static executables don’t pull in GHC via their closure.
+            # This remove-references-to fixes that for normal obelisk backends.
+            postInstall = ''
+              ${lib.getExe pkgs.removeReferencesTo} -t ${obelisk.snap-server} "$out/bin/backend"
+            '';
+          });
       exeFrontend = compressedJs frontend optimizationLevel externjs;
       exeFrontendAssets = mkAssets exeFrontend;
       exeAssets = mkAssets assets;