diff --git a/packages/lwt/lwt.5.8.0/opam b/packages/lwt/lwt.5.8.0/opam
new file mode 100644
index 00000000000..e0bf8004b5c
--- /dev/null
+++ b/packages/lwt/lwt.5.8.0/opam
@@ -0,0 +1,64 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+synopsis: "Promises and event-driven I/O"
+description: """
+A promise is a value that may become determined in the future.
+
+Lwt provides typed, composable promises. Promises that are resolved by I/O are
+resolved by Lwt in parallel.
+
+Meanwhile, OCaml code, including code creating and waiting on promises, runs in
+a single thread by default. This reduces the need for locks or other
+synchronization primitives. Code can be run in parallel on an opt-in basis.
+"""
+maintainer: [
+  "Raphaël Proust <code@bnwr.net>" "Anton Bachin <antonbachin@yahoo.com>"
+]
+authors: ["Jérôme Vouillon" "Jérémie Dimino"]
+license: "MIT"
+homepage: "https://github.com/ocsigen/lwt"
+doc: "https://ocsigen.org/lwt"
+bug-reports: "https://github.com/ocsigen/lwt/issues"
+depends: [
+  "dune" {>= "1.12"}
+  "ocaml" {>= "4.08"}
+  "cppo" {build & >= "1.1.0"}
+  "ocamlfind" {dev & >= "1.7.3-1"}
+  "odoc" {with-doc & >= "2.3.0"}
+  "dune-configurator"
+  "ocplib-endian"
+]
+depopts: ["base-threads" "base-unix" "conf-libev"]
+dev-repo: "git+https://github.com/ocsigen/lwt.git"
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "exec"
+    "-p"
+    name
+    "src/unix/config/discover.exe"
+    "--"
+    "--save"
+    "--use-libev" "%{conf-libev:installed}%"
+  ]
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+available: os-family != "windows" | "ocaml-version" < "5.2"
+url {
+  src: "https://github.com/ocsigen/lwt/archive/refs/tags/5.8.0.tar.gz"
+  checksum: [
+    "md5=2682558f405ab7c8638eeb16d0f9f46f"
+    "sha512=7f6548a1b1dbfdbc98d9352151ca7be97fa2ab63dbcc429208ce8d08308eee13f7fce31e0cca53f8880233959a60212d622270dd51bf164c3ee272f179769bd9"
+  ]
+}
diff --git a/packages/lwt_ppx/lwt_ppx.5.8.0/opam b/packages/lwt_ppx/lwt_ppx.5.8.0/opam
new file mode 100644
index 00000000000..5e4183ea1f6
--- /dev/null
+++ b/packages/lwt_ppx/lwt_ppx.5.8.0/opam
@@ -0,0 +1,40 @@
+# This file is generated by dune, edit dune-project instead
+opam-version: "2.0"
+synopsis:
+  "PPX syntax for Lwt, providing something similar to async/await from JavaScript"
+maintainer: [
+  "Raphaël Proust <code@bnwr.net>" "Anton Bachin <antonbachin@yahoo.com>"
+]
+authors: ["Jérôme Vouillon" "Jérémie Dimino"]
+license: "MIT"
+homepage: "https://github.com/ocsigen/lwt"
+doc: "https://ocsigen.org/lwt"
+bug-reports: "https://github.com/ocsigen/lwt/issues"
+depends: [
+  "dune" {>= "1.12"}
+  "ocaml" {>= "4.08"}
+  "ppxlib" {>= "0.16.0"}
+  "lwt"
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/ocsigen/lwt.git"
+url {
+  src: "https://github.com/ocsigen/lwt/archive/refs/tags/5.8.0.tar.gz"
+  checksum: [
+    "md5=2682558f405ab7c8638eeb16d0f9f46f"
+    "sha512=7f6548a1b1dbfdbc98d9352151ca7be97fa2ab63dbcc429208ce8d08308eee13f7fce31e0cca53f8880233959a60212d622270dd51bf164c3ee272f179769bd9"
+  ]
+}