diff --git a/packages/avro-simple/avro-simple.0.1/opam b/packages/avro-simple/avro-simple.0.1/opam
new file mode 100644
index 00000000000..c96788ac618
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+++ b/packages/avro-simple/avro-simple.0.1/opam
@@ -0,0 +1,52 @@
+opam-version: "2.0"
+synopsis: "Pure OCaml implementation of Apache Avro"
+description:
+  "A fast, feature-rich, pure OCaml implementation of Apache Avro with codec-based design, schema evolution support, and container file format."
+maintainer: ["timmcgil@gmail.com"]
+authors: ["Tim McGilchrist"]
+license: "BSD-3-clause"
+homepage: "https://github.com/tmcgilchrist/ocaml-avro"
+bug-reports: "https://github.com/tmcgilchrist/ocaml-avro/issues"
+depends: [
+  "ocaml" {>= "5.0"}
+  "dune" {>= "3.19" & >= "3.0"}
+  "yojson" {>= "2.0.0"}
+  "decompress" {>= "1.5.0"}
+  "bigstringaf" {>= "0.9.0"}
+  "uuidm" {>= "0.9"}
+  "zarith" {>= "1.14"}
+  "alcotest" {with-test & >= "1.7.0"}
+  "qcheck" {with-test & >= "0.20"}
+  "avro" {with-dev-setup}
+  "benchmark" {with-dev-setup}
+  "odoc" {with-doc}
+]
+depopts: [
+  "snappy" {>= "0.1.0"}
+  "zstd" {>= "0.3"}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test & arch != "arm32" & arch != "x86_32"}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/tmcgilchrist/ocaml-avro.git"
+x-maintenance-intent: ["(latest)"]
+url {
+  src:
+    "https://github.com/tmcgilchrist/ocaml-avro/releases/download/0.1/avro-simple-0.1.tbz"
+  checksum: [
+    "sha256=2f0f7e750a884920d2302fed302d920598789eba3673443d86ee1d7b57a663bc"
+    "sha512=25830478f5f2724b46e1a620e6e42486b53f95e1fc833c82a4a20d021ad9658ac4b50defc3b324dd7393e806460106bb4bad412c37114617ec361b0d64903f03"
+  ]
+}
+x-commit-hash: "e68a8de8fa3b69fd05189ed88ef45da9c6291442"