diff --git a/packages/libbinaryen/libbinaryen.105.0.0/opam b/packages/libbinaryen/libbinaryen.105.0.0/opam
new file mode 100644
index 00000000000..809ffe89011
--- /dev/null
+++ b/packages/libbinaryen/libbinaryen.105.0.0/opam
@@ -0,0 +1,27 @@
+opam-version: "2.0"
+synopsis: "Libbinaryen packaged for OCaml"
+maintainer: "blaine@grain-lang.org"
+authors: "Blaine Bublitz"
+license: "Apache-2.0"
+homepage: "https://github.com/grain-lang/libbinaryen"
+bug-reports: "https://github.com/grain-lang/libbinaryen/issues"
+depends: [
+  "conf-cmake" {build}
+  "dune" {>= "2.9.1"}
+  "dune-configurator" {>= "2.9.1"}
+  "ocaml" {>= "4.12"}
+]
+build: [
+  ["dune" "subst"] {dev}
+  ["dune" "build" "-p" name "-j" jobs]
+]
+depexts: ["gcc-g++"] {os-distribution = "cygwinports"}
+dev-repo: "git+https://github.com/grain-lang/libbinaryen.git"
+url {
+  src:
+    "https://github.com/grain-lang/libbinaryen/releases/download/v105.0.0/libbinaryen-v105.0.0.tar.gz"
+  checksum: [
+    "md5=e8343526699cbf3daa9ad4f0da353464"
+    "sha512=c59d546b5a017a1f779e99db33a64555964bf1c437925ee717138a9599f58877cc5e16c45fe27799e7f35a4a18646c7bd9ba02ded77150b66428c895d0ed2010"
+  ]
+}
\ No newline at end of file