diff --git a/packages/reason/reason.3.17.1/opam b/packages/reason/reason.3.17.1/opam
new file mode 100644
index 000000000000..c3c99f947307
--- /dev/null
+++ b/packages/reason/reason.3.17.1/opam
@@ -0,0 +1,51 @@
+opam-version: "2.0"
+synopsis: "Reason: Syntax & Toolchain for OCaml"
+description: """
+Reason gives OCaml a new syntax that is remniscient of languages like
+JavaScript. It's also the umbrella project for a set of tools for the OCaml &
+JavaScript ecosystem."""
+maintainer: [
+  "Jordan Walke <jordojw@gmail.com>"
+  "Antonio Nuno Monteiro <anmonteiro@gmail.com>"
+]
+authors: ["Jordan Walke <jordojw@gmail.com>"]
+license: "MIT"
+homepage: "https://reasonml.github.io/"
+bug-reports: "https://github.com/reasonml/reason/issues"
+depends: [
+  "dune" {>= "3.8"}
+  "ocaml" {>= "4.08" & < "5.5"}
+  "ocamlfind" {build}
+  "cmdliner" {>= "1.1.0" & < "2.0"}
+  "dune-build-info" {>= "2.9.3"}
+  "menhir" {>= "20180523"}
+  "merlin-extend" {>= "0.6.2"}
+  "fix"
+  "cppo"
+  "ppxlib" {>= "0.36"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/reasonml/reason.git"
+url {
+  src:
+    "https://github.com/reasonml/reason/releases/download/3.17.1/reason-3.17.1.tbz"
+  checksum: [
+    "sha256=8f82f153b5b875a491a3a90b3a7ed3f5b21bf4d47624f9f3b54e84669e618b00"
+    "sha512=ef6195db64cf47374f1a632e9717e02d16cb3132b6ce65c8366e53889eb5a5befa3f7e52e4b4a95f65a27df136af8e6b7641680e60d87f7a6bdfa874e869f3b0"
+  ]
+}
+x-commit-hash: "9ed7a1a7f89c2833324310ac714e1d679da56497"
diff --git a/packages/rtop/rtop.3.17.1/opam b/packages/rtop/rtop.3.17.1/opam
new file mode 100644
index 000000000000..8e42159f6b3e
--- /dev/null
+++ b/packages/rtop/rtop.3.17.1/opam
@@ -0,0 +1,44 @@
+opam-version: "2.0"
+synopsis: "Reason toplevel"
+description:
+  "rtop is the toplevel (or REPL) for Reason, based on utop (https://github.com/ocaml-community/utop)."
+maintainer: [
+  "Jordan Walke <jordojw@gmail.com>"
+  "Antonio Nuno Monteiro <anmonteiro@gmail.com>"
+]
+authors: ["Jordan Walke <jordojw@gmail.com>"]
+license: "MIT"
+homepage: "https://reasonml.github.io/"
+bug-reports: "https://github.com/reasonml/reason/issues"
+depends: [
+  "dune" {>= "3.8"}
+  "ocaml" {>= "4.08" & < "5.5"}
+  "reason" {= version}
+  "utop" {>= "2.0"}
+  "cppo"
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/reasonml/reason.git"
+url {
+  src:
+    "https://github.com/reasonml/reason/releases/download/3.17.1/reason-3.17.1.tbz"
+  checksum: [
+    "sha256=8f82f153b5b875a491a3a90b3a7ed3f5b21bf4d47624f9f3b54e84669e618b00"
+    "sha512=ef6195db64cf47374f1a632e9717e02d16cb3132b6ce65c8366e53889eb5a5befa3f7e52e4b4a95f65a27df136af8e6b7641680e60d87f7a6bdfa874e869f3b0"
+  ]
+}
+x-commit-hash: "9ed7a1a7f89c2833324310ac714e1d679da56497"