diff --git a/packages/forester/forester.4.1.0/opam b/packages/forester/forester.4.1.0/opam
new file mode 100644
index 00000000000..793edcad42e
--- /dev/null
+++ b/packages/forester/forester.4.1.0/opam
@@ -0,0 +1,50 @@
+opam-version: "2.0"
+synopsis: "A tool for tending mathematical forests"
+maintainer: "Jonathan Sterling"
+authors: "Jonathan Sterling"
+license: "GPL-3.0-or-later"
+homepage: "https://sr.ht/~jonsterling/forester/"
+bug-reports: "https://todo.sr.ht/~jonsterling/forester"
+depends: [
+  "menhir" {>= "20211230"}
+  "ocamlgraph" {>= "2.1.0"}
+  "ocaml" {>= "5.1.1"}
+  "dune" {>= "3.7"}
+  "ppx_deriving"
+  "cmdliner" {>= "1.2.0"}
+  "dune-build-info"
+  "uucp" {>= "15.1.0"}
+  "eio_main" {>= "1.1"}
+  "ptime" {>= "1.1.0"}
+  "asai" {>= "0.3.0"}
+  "yuujinchou" {>= "5.2.0"}
+  "bwd" {>= "2.3.0"}
+  "algaeff" {>= "2.0.0"}
+  "yojson" {>= "2.1.2"}
+  "toml" {>= "7.1.0"}
+  "repr" {>= "0.7.0"}
+  "uri" {>= "4.4.0"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://git.sr.ht/~jonsterling/ocaml-forester"
+url {
+  src: "https://git.sr.ht/~jonsterling/ocaml-forester/archive/4.1.0.tar.gz"
+  checksum: [
+    "md5=576a2fe0666a6bd9fbbf9a567c0aee79"
+    "sha512=af7666a0bcd8fb20497a8c0a0bc01cb57db0bde07d68952e40d37464efe81c3a3c8207a5e5dc88264a5f67b5815874e88f3aa31972dd5f0413d44f97e11b758e"
+  ]
+}
\ No newline at end of file