diff --git a/packages/opatch/opatch.3.0.1/opam b/packages/opatch/opatch.3.0.1/opam
new file mode 100644
index 000000000000..9fe68a43310c
--- /dev/null
+++ b/packages/opatch/opatch.3.0.1/opam
@@ -0,0 +1,41 @@
+opam-version: "2.0"
+synopsis: "Pure OCaml command-line tool to apply a patch"
+description:
+  "Command-line tool to apply a unified diff or git-diff to a directory"
+maintainer: ["Samuel Hym <samuel@tarides.com>"]
+authors: [
+  "Kate Deplaix <kit-ty-kate@exn.st>" "Samuel Hym <samuel@tarides.com>"
+]
+license: "ISC"
+homepage: "https://github.com/hannesm/patch"
+bug-reports: "https://github.com/hannesm/patch/issues"
+depends: [
+  "dune" {>= "3.0"}
+  "ocaml" {>= "4.14"}
+  "patch" {= "3.0.0"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/hannesm/patch.git"
+url {
+  src:
+    "https://github.com/hannesm/patch/releases/download/v3.0.1/patch-3.0.1.tbz"
+  checksum: [
+    "sha256=8e561910f7af8597ea65035b689e77a3147be731963507c4b0820ba4a5f91c72"
+    "sha512=1fb9064a659abb5884d503003b02d97ef568c5645bf1feae94b62035b34847f1ecedd1ef2c1925dc2e5b28878987c81259027fc46ca6ed6c3b8d977ac49f0c15"
+  ]
+}
+x-commit-hash: "7b0149bcd625edbb649f0598305a1da69196558e"
+x-maintenance-intent: ["(latest)"]