diff --git a/packages/happy-eyeballs-lwt/happy-eyeballs-lwt.1.2.0/opam b/packages/happy-eyeballs-lwt/happy-eyeballs-lwt.1.2.0/opam
new file mode 100644
index 000000000000..95f13ef0630e
--- /dev/null
+++ b/packages/happy-eyeballs-lwt/happy-eyeballs-lwt.1.2.0/opam
@@ -0,0 +1,43 @@
+opam-version: "2.0"
+maintainer: "Robur <team@robur.coop>"
+authors: ["Robur <team@robur.coop>"]
+homepage: "https://github.com/robur-coop/happy-eyeballs"
+dev-repo: "git+https://github.com/robur-coop/happy-eyeballs.git"
+bug-reports: "https://github.com/robur-coop/happy-eyeballs/issues"
+doc: "https://robur-coop.github.io/happy-eyeballs/"
+license: "ISC"
+
+depends: [
+  "ocaml" {>= "4.08.0"}
+  "dune" {>= "2.0.0"}
+  "happy-eyeballs" {=version}
+  "cmdliner" {>= "1.1.0"}
+  "duration"
+  "dns" {>= "7.0.0"}
+  "domain-name"
+  "ipaddr"
+  "fmt"
+  "logs"
+  "lwt"
+  "mtime" {>= "1.0.0"}
+]
+build: [
+  ["dune" "subst"] {dev}
+  ["dune" "build" "-p" name "-j" jobs]
+]
+
+synopsis: "Connecting to a remote host via IP version 4 or 6 using Lwt_unix"
+description: """
+Happy eyeballs is an implementation of RFC 8305 which specifies how to connect
+to a remote host using either IP protocol version 4 or IP protocol version 6.
+This uses Lwt and Lwt_unix for side effects.
+"""
+url {
+  src:
+    "https://github.com/robur-coop/happy-eyeballs/releases/download/v1.2.0/happy-eyeballs-1.2.0.tbz"
+  checksum: [
+    "sha256=33f1bc57a9fa60a0706f39becf2876f1b3a49b73dbd83d5b1b055894d4a10d48"
+    "sha512=f177421c0667459a67f6ae4c434be563fe7b05fbe6c5c6155e55c9b742349ed7002368860681e8d9443092543a130cfc5bd5dfe4fceab540dd9957e96325ee3b"
+  ]
+}
+x-commit-hash: "2a2f276b547d9ac34c0ce9ca40a19b67c7db726f"
diff --git a/packages/happy-eyeballs-miou-unix/happy-eyeballs-miou-unix.1.2.0/opam b/packages/happy-eyeballs-miou-unix/happy-eyeballs-miou-unix.1.2.0/opam
new file mode 100644
index 000000000000..a2eb13aa3849
--- /dev/null
+++ b/packages/happy-eyeballs-miou-unix/happy-eyeballs-miou-unix.1.2.0/opam
@@ -0,0 +1,42 @@
+opam-version: "2.0"
+maintainer: "Robur <team@robur.coop>"
+authors: ["Robur <team@robur.coop>"]
+homepage: "https://github.com/robur-coop/miou-toolkit"
+dev-repo: "git+https://github.com/robur-coop/miou-toolkit.git"
+bug-reports: "https://github.com/robur-coop/miou-toolkit/issues"
+doc: "https://robur-coop.github.io/miou-toolkit/"
+license: "ISC"
+
+depends: [
+  "ocaml" {>= "5.0.0"}
+  "dune" {>= "2.0.0"}
+  "happy-eyeballs" {= version}
+  "miou" {>= "0.2.0"}
+  "mtime" {>= "2.0.0"}
+  "duration"
+  "domain-name"
+  "ipaddr"
+  "fmt"
+  "logs"
+  "cmdliner"
+]
+build: [
+  ["dune" "subst"] {dev}
+  ["dune" "build" "-p" name "-j" jobs]
+]
+
+synopsis: "Connecting to a remote host via IP version 4 or 6 using Miou"
+description: """
+Happy eyeballs is an implementation of RFC 8305 which specifies how to connect
+to a remote host using either IP protocol version 4 or IP protocol version 6.
+This uses Miou for side effects.
+"""
+url {
+  src:
+    "https://github.com/robur-coop/happy-eyeballs/releases/download/v1.2.0/happy-eyeballs-1.2.0.tbz"
+  checksum: [
+    "sha256=33f1bc57a9fa60a0706f39becf2876f1b3a49b73dbd83d5b1b055894d4a10d48"
+    "sha512=f177421c0667459a67f6ae4c434be563fe7b05fbe6c5c6155e55c9b742349ed7002368860681e8d9443092543a130cfc5bd5dfe4fceab540dd9957e96325ee3b"
+  ]
+}
+x-commit-hash: "2a2f276b547d9ac34c0ce9ca40a19b67c7db726f"
diff --git a/packages/happy-eyeballs-mirage/happy-eyeballs-mirage.1.2.0/opam b/packages/happy-eyeballs-mirage/happy-eyeballs-mirage.1.2.0/opam
new file mode 100644
index 000000000000..e384f09fc0e2
--- /dev/null
+++ b/packages/happy-eyeballs-mirage/happy-eyeballs-mirage.1.2.0/opam
@@ -0,0 +1,43 @@
+opam-version: "2.0"
+maintainer: "Robur <team@robur.coop>"
+authors: ["Robur <team@robur.coop>"]
+homepage: "https://github.com/robur-coop/happy-eyeballs"
+dev-repo: "git+https://github.com/robur-coop/happy-eyeballs.git"
+bug-reports: "https://github.com/robur-coop/happy-eyeballs/issues"
+doc: "https://robur-coop.github.io/happy-eyeballs/"
+license: "ISC"
+
+depends: [
+  "ocaml" {>= "4.08.0"}
+  "dune" {>= "2.0.0"}
+  "happy-eyeballs" {=version}
+  "duration"
+  "domain-name"
+  "ipaddr"
+  "fmt"
+  "logs"
+  "lwt"
+  "mirage-clock" {>= "3.0.0"}
+  "tcpip" {>= "7.0.0"}
+  "mirage-time" {>= "2.0.0"}
+]
+build: [
+  ["dune" "subst"] {dev}
+  ["dune" "build" "-p" name "-j" jobs]
+]
+
+synopsis: "Connecting to a remote host via IP version 4 or 6 using Mirage"
+description: """
+Happy eyeballs is an implementation of RFC 8305 which specifies how to connect
+to a remote host using either IP protocol version 4 or IP protocol version 6.
+This uses Lwt and Mirage for side effects.
+"""
+url {
+  src:
+    "https://github.com/robur-coop/happy-eyeballs/releases/download/v1.2.0/happy-eyeballs-1.2.0.tbz"
+  checksum: [
+    "sha256=33f1bc57a9fa60a0706f39becf2876f1b3a49b73dbd83d5b1b055894d4a10d48"
+    "sha512=f177421c0667459a67f6ae4c434be563fe7b05fbe6c5c6155e55c9b742349ed7002368860681e8d9443092543a130cfc5bd5dfe4fceab540dd9957e96325ee3b"
+  ]
+}
+x-commit-hash: "2a2f276b547d9ac34c0ce9ca40a19b67c7db726f"
diff --git a/packages/happy-eyeballs/happy-eyeballs.1.2.0/opam b/packages/happy-eyeballs/happy-eyeballs.1.2.0/opam
new file mode 100644
index 000000000000..e4a0cf2b88d9
--- /dev/null
+++ b/packages/happy-eyeballs/happy-eyeballs.1.2.0/opam
@@ -0,0 +1,40 @@
+opam-version: "2.0"
+maintainer: "Robur <team@robur.coop>"
+authors: ["Robur <team@robur.coop>"]
+homepage: "https://github.com/robur-coop/happy-eyeballs"
+dev-repo: "git+https://github.com/robur-coop/happy-eyeballs.git"
+bug-reports: "https://github.com/robur-coop/happy-eyeballs/issues"
+doc: "https://robur-coop.github.io/happy-eyeballs/"
+license: "ISC"
+
+depends: [
+  "ocaml" {>= "4.08.0"}
+  "dune" {>= "2.0.0"}
+  "duration"
+  "domain-name" {>= "0.2.0"}
+  "ipaddr" {>= "5.2.0"}
+  "fmt" {>= "0.8.7"}
+  "logs"
+]
+build: [
+  ["dune" "subst"] {dev}
+  ["dune" "build" "-p" name "-j" jobs]
+]
+
+synopsis: "Connecting to a remote host via IP version 4 or 6"
+description: """
+Happy eyeballs is an implementation of
+[RFC 8305](https://datatracker.ietf.org/doc/html/rfc8305) which specifies how
+to connect to a remote host using either IP protocol version 4 or IP protocol
+version 6. This is the core of the algorithm in value passing style, with a
+slick dependency cone.
+"""
+url {
+  src:
+    "https://github.com/robur-coop/happy-eyeballs/releases/download/v1.2.0/happy-eyeballs-1.2.0.tbz"
+  checksum: [
+    "sha256=33f1bc57a9fa60a0706f39becf2876f1b3a49b73dbd83d5b1b055894d4a10d48"
+    "sha512=f177421c0667459a67f6ae4c434be563fe7b05fbe6c5c6155e55c9b742349ed7002368860681e8d9443092543a130cfc5bd5dfe4fceab540dd9957e96325ee3b"
+  ]
+}
+x-commit-hash: "2a2f276b547d9ac34c0ce9ca40a19b67c7db726f"