diff --git a/packages/menhir-windows/menhir-windows.20230608/opam b/packages/menhir-windows/menhir-windows.20230608/opam
new file mode 100644
index 00000000..d2544d13
--- /dev/null
+++ b/packages/menhir-windows/menhir-windows.20230608/opam
@@ -0,0 +1,30 @@
+opam-version: "2.0"
+maintainer: "francois.pottier@inria.fr"
+authors: [
+  "François Pottier <francois.pottier@inria.fr>"
+  "Yann Régis-Gianas <yrg@pps.univ-paris-diderot.fr>"
+]
+homepage: "http://gitlab.inria.fr/fpottier/menhir"
+dev-repo: "git+https://gitlab.inria.fr/fpottier/menhir.git"
+bug-reports: "https://gitlab.inria.fr/fpottier/menhir/-/issues"
+license: "GPL-2.0-only"
+build: [
+  ["dune" "build" "-p" "menhir" "-j" jobs "-x" "windows"]
+]
+depends: [
+  "ocaml-windows" {>= "4.03.0"}
+  "dune" {build & >= "2.8.0"}
+  "menhirLib" {= version}
+  "menhirSdk" {= version}
+  "menhirLib-windows" {= version}
+  "menhirSdk-windows" {= version}
+]
+synopsis: "An LR(1) parser generator"
+url {
+  src:
+    "https://gitlab.inria.fr/fpottier/menhir/-/archive/20230608/archive.tar.gz"
+  checksum: [
+    "md5=8ff26b1e3685c472b7b3aba2fe938a43"
+    "sha512=334b9dcb1283a28b8547082a89536b1d439ff588290b8eaecdf4802c5f74dbc8d16ad6fc6c0820036183518d83e2cc273a75787a8b41137424c8e7ee82e2b50a"
+  ]
+}
diff --git a/packages/menhirLib-windows/menhirLib-windows.20230608/opam b/packages/menhirLib-windows/menhirLib-windows.20230608/opam
new file mode 100644
index 00000000..a22a16f4
--- /dev/null
+++ b/packages/menhirLib-windows/menhirLib-windows.20230608/opam
@@ -0,0 +1,29 @@
+opam-version: "2.0"
+maintainer: "francois.pottier@inria.fr"
+authors: [
+  "François Pottier <francois.pottier@inria.fr>"
+  "Yann Régis-Gianas <yrg@pps.univ-paris-diderot.fr>"
+]
+homepage: "http://gitlab.inria.fr/fpottier/menhir"
+dev-repo: "git+https://gitlab.inria.fr/fpottier/menhir.git"
+bug-reports: "https://gitlab.inria.fr/fpottier/menhir/-/issues"
+license: "LGPL-2.0-only with OCaml-LGPL-linking-exception"
+build: [
+  ["dune" "build" "-p" "menhirLib" "-j" jobs "-x" "windows"]
+]
+depends: [
+  "ocaml-windows"  { >= "4.03.0" }
+  "dune"   { build & >= "2.8.0"  }
+]
+conflicts: [
+  "menhir-windows" { != version  }
+]
+synopsis: "Runtime support library for parsers generated by Menhir"
+url {
+  src:
+    "https://gitlab.inria.fr/fpottier/menhir/-/archive/20230608/archive.tar.gz"
+  checksum: [
+    "md5=8ff26b1e3685c472b7b3aba2fe938a43"
+    "sha512=334b9dcb1283a28b8547082a89536b1d439ff588290b8eaecdf4802c5f74dbc8d16ad6fc6c0820036183518d83e2cc273a75787a8b41137424c8e7ee82e2b50a"
+  ]
+}
diff --git a/packages/menhirSdk-windows/menhirSdk-windows.20230608/opam b/packages/menhirSdk-windows/menhirSdk-windows.20230608/opam
new file mode 100644
index 00000000..31fe9b7d
--- /dev/null
+++ b/packages/menhirSdk-windows/menhirSdk-windows.20230608/opam
@@ -0,0 +1,29 @@
+opam-version: "2.0"
+maintainer: "francois.pottier@inria.fr"
+authors: [
+  "François Pottier <francois.pottier@inria.fr>"
+  "Yann Régis-Gianas <yrg@pps.univ-paris-diderot.fr>"
+]
+homepage: "http://gitlab.inria.fr/fpottier/menhir"
+dev-repo: "git+https://gitlab.inria.fr/fpottier/menhir.git"
+bug-reports: "https://gitlab.inria.fr/fpottier/menhir/-/issues"
+license: "LGPL-2.0-only with OCaml-LGPL-linking-exception"
+build: [
+  ["dune" "build" "-p" "menhirSdk" "-j" jobs "-x" "windows"]
+]
+depends: [
+  "ocaml-windows"  { >= "4.03.0" }
+  "dune"   { build & >= "2.8.0"  }
+]
+conflicts: [
+  "menhir-windows" { != version  }
+]
+synopsis: "Compile-time library for auxiliary tools related to Menhir"
+url {
+  src:
+    "https://gitlab.inria.fr/fpottier/menhir/-/archive/20230608/archive.tar.gz"
+  checksum: [
+    "md5=8ff26b1e3685c472b7b3aba2fe938a43"
+    "sha512=334b9dcb1283a28b8547082a89536b1d439ff588290b8eaecdf4802c5f74dbc8d16ad6fc6c0820036183518d83e2cc273a75787a8b41137424c8e7ee82e2b50a"
+  ]
+}