diff --git a/packages/cryptokit/cryptokit.1.19/opam b/packages/cryptokit/cryptokit.1.19/opam
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+opam-version: "2.0"
+synopsis: "A library of cryptographic primitives"
+description:
+  "Cryptokit includes authenticated encryption (AES-GCM, Chacha20-Poly1305), block ciphers (AES, DES, 3DES), stream ciphers (Chacha20, ARCfour), public-key cryptography (RSA, DH), hashes (SHA-256, SHA-512, SHA-3, Blake2, Blake3), MACs, compression, random number generation -- all presented with a compositional, extensible interface."
+maintainer: ["Xavier Leroy <xavier.leroy@college-de-france.fr>"]
+authors: ["Xavier Leroy"]
+license: "LGPL-2.0-or-later WITH OCaml-LGPL-linking-exception"
+homepage: "https://github.com/xavierleroy/cryptokit"
+bug-reports: "https://github.com/xavierleroy/cryptokit/issues"
+depends: [
+  "ocaml" {>= "4.08.0"}
+  "dune" {>= "2.5"}
+  "dune-configurator"
+  "zarith" {>= "1.4"}
+  "conf-zlib"
+  "conf-gmp-powm-sec"
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/xavierleroy/cryptokit.git"
+url {
+  src: "https://github.com/xavierleroy/cryptokit/archive/release119.tar.gz"
+  checksum: [
+    "sha256=a7e203aac7fb86fa26fbcc5e7243c8e0f46f0d084bfaf06767d0b816fc12ccb1"
+    "sha512=11c942d561e9808b8811400fa1b4b738ded2e3f7b4e3d886c00b97a6cd7c726ff384962aee821885e06bcf6bbe3a34d3157a4a4c89defb5b474c01165085d08b"
+  ]
+}
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