diff --git a/packages/seqes/seqes.0.3/opam b/packages/seqes/seqes.0.3/opam
new file mode 100644
index 00000000000..cf0cd317e16
--- /dev/null
+++ b/packages/seqes/seqes.0.3/opam
@@ -0,0 +1,43 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+synopsis: "Seq with monads"
+description: "Variations of the Seq module with monads folded into the type"
+maintainer: ["Raphaël Proust"]
+authors: ["Raphaël Proust"]
+license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
+tags: ["monad" "seq"]
+homepage: "https://gitlab.com/raphael-proust/seqes"
+doc: "https://gitlab.com/raphael-proust/seqes"
+bug-reports: "https://gitlab.com/raphael-proust/seqes/-/issues"
+depends: [
+  "ocaml" {>= "4.14"}
+  "dune" {>= "3.0"}
+  "qcheck" {with-test & >= "0.19"}
+  "qcheck-alcotest" {with-test}
+  "alcotest" {with-test & >= "1.5.0"}
+  "mutaml" {with-dev-setup}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://gitlab.com/raphael-proust/seqes.git"
+url {
+  src:
+    "https://gitlab.com/raphael-proust/seqes/-/archive/0.3/seqes-0.3.tar.gz"
+  checksum: [
+    "md5=e37b055d887344847f5161fa5bd3588c"
+    "sha512=c564e342d7e5839038b19bee0bbfefaad329db1d0b89a196ec272433d2b5af9957955596c57727e8c93b97df81c4f1a4cb9dcf281a336f84c7de94b07638be4f"
+  ]
+}