diff --git a/packages/ciao_lwt/ciao_lwt.0.1/opam b/packages/ciao_lwt/ciao_lwt.0.1/opam
new file mode 100644
index 00000000000..2761c4ebdd5
--- /dev/null
+++ b/packages/ciao_lwt/ciao_lwt.0.1/opam
@@ -0,0 +1,67 @@
+opam-version: "2.0"
+synopsis:
+  "A tool for migrating from Lwt to direct-style concurrency libraries"
+maintainer: [
+  "Jules Aguillon <jules@j3s.fr>"
+  "Nicolas Osborne <nicolas.osborne@tarides.com>"
+]
+authors: [
+  "Jules Aguillon <jules@j3s.fr>"
+  "Nicolas Osborne <nicolas.osborne@tarides.com>"
+]
+license: "MIT"
+homepage: "https://github.com/tarides/ciao-lwt"
+bug-reports: "https://github.com/tarides/ciao-lwt/issues"
+depends: [
+  "dune" {>= "3.17"}
+  "ocaml" {= "5.2"}
+  "cmdliner"
+  "merlin-lib"
+  "lwt" {with-test}
+  "js_of_ocaml-lwt" {with-test}
+  "ocaml-index" {with-test}
+  "ocaml" {>= "4.08"}
+  "base" {>= "v0.12.0"}
+  "cmdliner" {>= "1.1.0" & < "2.0.0"}
+  "dune-build-info"
+  "either"
+  "fix"
+  "fpath" {>= "0.7.3"}
+  "menhir" {>= "20201216"}
+  "menhirLib" {>= "20201216"}
+  "menhirSdk" {>= "20201216"}
+  "ocaml-version" {>= "3.5.0"}
+  "ocp-indent" {>= "1.8.0"}
+  "stdio"
+  "uuseg" {>= "10.0.0"}
+  "uutf" {>= "1.0.1"}
+  "csexp" {>= "1.4.0"}
+  "astring"
+  "camlp-streams"
+  "re"
+  "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/tarides/ciao-lwt.git"
+url {
+  src:
+    "https://github.com/tarides/ciao-lwt/releases/download/0.1/ciao_lwt-0.1.tbz"
+  checksum: [
+    "sha256=76e1ade0df64d32caf4d2f381d0574cd50396c0f40b4d835ae051d122de26f29"
+    "sha512=85b422b2dbbd4770e8adc400027eae5b0fd5fc8b1975e323e0d65746eb565d6887a4e4176c3312446fd830f1626a2f47e8f8a5be04a750347040567fafcf5c9b"
+  ]
+}
+x-commit-hash: "a0e8b117ef06ba5cca17c2a69c8620c6419e7419"
diff --git a/packages/lwt_lint/lwt_lint.0.1/opam b/packages/lwt_lint/lwt_lint.0.1/opam
new file mode 100644
index 00000000000..f6e0ccf6598
--- /dev/null
+++ b/packages/lwt_lint/lwt_lint.0.1/opam
@@ -0,0 +1,60 @@
+opam-version: "2.0"
+synopsis: "A linter for code that might cause implicit forking in Lwt"
+maintainer: [
+  "Jules Aguillon <jules@j3s.fr>"
+  "Nicolas Osborne <nicolas.osborne@tarides.com>"
+]
+authors: [
+  "Jules Aguillon <jules@j3s.fr>"
+  "Nicolas Osborne <nicolas.osborne@tarides.com>"
+]
+license: "MIT"
+homepage: "https://github.com/tarides/ciao-lwt"
+bug-reports: "https://github.com/tarides/ciao-lwt/issues"
+depends: [
+  "dune" {>= "3.17"}
+  "ocaml" {= "5.2"}
+  "base" {>= "v0.12.0"}
+  "cmdliner" {>= "1.1.0"}
+  "dune-build-info"
+  "either"
+  "fix"
+  "fpath" {>= "0.7.3"}
+  "menhir" {>= "20201216"}
+  "menhirLib" {>= "20201216"}
+  "menhirSdk" {>= "20201216"}
+  "ocaml-version" {>= "3.5.0"}
+  "ocp-indent" {>= "1.8.0"}
+  "stdio"
+  "uuseg" {>= "10.0.0"}
+  "uutf" {>= "1.0.1"}
+  "csexp" {>= "1.4.0"}
+  "astring"
+  "camlp-streams"
+  "re"
+  "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/tarides/ciao-lwt.git"
+url {
+  src:
+    "https://github.com/tarides/ciao-lwt/releases/download/0.1/ciao_lwt-0.1.tbz"
+  checksum: [
+    "sha256=76e1ade0df64d32caf4d2f381d0574cd50396c0f40b4d835ae051d122de26f29"
+    "sha512=85b422b2dbbd4770e8adc400027eae5b0fd5fc8b1975e323e0d65746eb565d6887a4e4176c3312446fd830f1626a2f47e8f8a5be04a750347040567fafcf5c9b"
+  ]
+}
+x-commit-hash: "a0e8b117ef06ba5cca17c2a69c8620c6419e7419"
diff --git a/packages/lwt_ppx_to_let_syntax/lwt_ppx_to_let_syntax.0.1/opam b/packages/lwt_ppx_to_let_syntax/lwt_ppx_to_let_syntax.0.1/opam
new file mode 100644
index 00000000000..36745b34fae
--- /dev/null
+++ b/packages/lwt_ppx_to_let_syntax/lwt_ppx_to_let_syntax.0.1/opam
@@ -0,0 +1,62 @@
+opam-version: "2.0"
+synopsis: "A tool for migrating away from lwt_ppx"
+maintainer: [
+  "Jules Aguillon <jules@j3s.fr>"
+  "Nicolas Osborne <nicolas.osborne@tarides.com>"
+]
+authors: [
+  "Jules Aguillon <jules@j3s.fr>"
+  "Nicolas Osborne <nicolas.osborne@tarides.com>"
+]
+license: "MIT"
+homepage: "https://github.com/tarides/ciao-lwt"
+bug-reports: "https://github.com/tarides/ciao-lwt/issues"
+depends: [
+  "dune" {>= "3.17"}
+  "ocaml"
+  "cmdliner"
+  "ocaml" {>= "5.2"}
+  "base" {>= "v0.12.0"}
+  "cmdliner" {>= "1.1.0"}
+  "dune-build-info"
+  "either"
+  "fix"
+  "fpath" {>= "0.7.3"}
+  "menhir" {>= "20201216"}
+  "menhirLib" {>= "20201216"}
+  "menhirSdk" {>= "20201216"}
+  "ocaml-version" {>= "3.5.0"}
+  "ocp-indent" {>= "1.8.0"}
+  "stdio"
+  "uuseg" {>= "10.0.0"}
+  "uutf" {>= "1.0.1"}
+  "csexp" {>= "1.4.0"}
+  "astring"
+  "camlp-streams"
+  "re"
+  "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/tarides/ciao-lwt.git"
+url {
+  src:
+    "https://github.com/tarides/ciao-lwt/releases/download/0.1/ciao_lwt-0.1.tbz"
+  checksum: [
+    "sha256=76e1ade0df64d32caf4d2f381d0574cd50396c0f40b4d835ae051d122de26f29"
+    "sha512=85b422b2dbbd4770e8adc400027eae5b0fd5fc8b1975e323e0d65746eb565d6887a4e4176c3312446fd830f1626a2f47e8f8a5be04a750347040567fafcf5c9b"
+  ]
+}
+x-commit-hash: "a0e8b117ef06ba5cca17c2a69c8620c6419e7419"