diff --git a/packages/lablgtk3-goocanvas2/lablgtk3-goocanvas2.3.1.5/opam b/packages/lablgtk3-goocanvas2/lablgtk3-goocanvas2.3.1.5/opam
new file mode 100644
index 00000000000..31f52666f47
--- /dev/null
+++ b/packages/lablgtk3-goocanvas2/lablgtk3-goocanvas2.3.1.5/opam
@@ -0,0 +1,38 @@
+opam-version: "2.0"
+
+synopsis: "OCaml interface to GTK+ GooCanvas library"
+description: """
+OCaml interface to GTK+3, goocanvas library.
+
+See https://garrigue.github.io/lablgtk/ for more information.
+"""
+
+maintainer: "garrigue@math.nagoya-u.ac.jp"
+authors: ["Jacques Garrigue et al., Nagoya University"]
+homepage: "https://github.com/garrigue/lablgtk"
+bug-reports: "https://github.com/garrigue/lablgtk/issues"
+dev-repo: "git+https://github.com/garrigue/lablgtk.git"
+doc: "https://garrigue.github.io/lablgtk/lablgtk3/lablgtk3-goocanvas2"
+license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
+
+depends: [
+  "ocaml"                {         >= "4.09.0" }
+  "dune"                 {         >= "1.8.0"  }
+  "lablgtk3"             {          = version  }
+  "conf-goocanvas2"      { build & >= "0"      }
+  "camlp-streams"        { build               }
+]
+
+build: [
+  [ "dune" "subst" ] {dev}
+  [ "dune" "build" "-p" name "-j" jobs ]
+]
+url {
+  src:
+    "https://github.com/garrigue/lablgtk/releases/download/3.1.5/lablgtk3-3.1.5.tbz"
+  checksum: [
+    "sha256=d4821cdbecf3ae374f20317d63e43fe58030c3ba9657b51a2e83e652197e8eac"
+    "sha512=83f0be38a1e21737de93f88b0adac15cdcc50cf712d773720b9bc1e8d8ffdb2c660d35840f25d326a42a9d4e6537e6cef466099bf72494196b2cc79977e703e3"
+  ]
+}
+x-commit-hash: "afbd6d2ee90b98cb0ea49cba34659e15b00cbfe3"
diff --git a/packages/lablgtk3-gtkspell3/lablgtk3-gtkspell3.3.1.5/opam b/packages/lablgtk3-gtkspell3/lablgtk3-gtkspell3.3.1.5/opam
new file mode 100644
index 00000000000..cf6b14c2373
--- /dev/null
+++ b/packages/lablgtk3-gtkspell3/lablgtk3-gtkspell3.3.1.5/opam
@@ -0,0 +1,49 @@
+opam-version: "2.0"
+
+synopsis: "OCaml interface to GTK+3"
+description: """
+OCaml interface to GTK+3, gtkspell library
+
+See https://garrigue.github.io/lablgtk/ for more information.
+
+"""
+
+maintainer: "garrigue@math.nagoya-u.ac.jp"
+authors: ["Jacques Garrigue et al., Nagoya University"]
+homepage: "https://github.com/garrigue/lablgtk"
+bug-reports: "https://github.com/garrigue/lablgtk/issues"
+dev-repo: "git+https://github.com/garrigue/lablgtk.git"
+doc: "https://garrigue.github.io/lablgtk/lablgtk3/lablgtk3-gtkspell3"
+license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
+
+depends: [
+  "ocaml"                { >= "4.09.0" }
+  "dune"                 { >= "1.8.0"  }
+  "lablgtk3"             {  = version  }
+]
+depexts: [
+  ["gtkspell3-dev"] {os-distribution = "alpine"}
+  ["gtkspell3"] {os-distribution = "archlinux"}
+  ["epel-release" "gtkspell3-devel"] {os-distribution = "centos"}
+  ["libgtkspell3-3-dev"] {os-distribution = "debian"}
+  ["gtkspell3-devel"] {os-distribution = "fedora"}
+  ["gtkspell3"] {os = "freebsd"}
+  ["gtkspell3"] {os = "openbsd"}
+  ["gtkspell3-devel"] {os-family = "suse"}
+  ["libgtkspell3-3-dev"] {os-distribution = "ubuntu"}
+  ["gtkspell3" "libxml2"] {os = "macos" & os-distribution = "homebrew"}
+]
+
+build: [
+  [ "dune" "subst" ] {pinned}
+  [ "dune" "build" "-p" name "-j" jobs ]
+]
+url {
+  src:
+    "https://github.com/garrigue/lablgtk/releases/download/3.1.5/lablgtk3-3.1.5.tbz"
+  checksum: [
+    "sha256=d4821cdbecf3ae374f20317d63e43fe58030c3ba9657b51a2e83e652197e8eac"
+    "sha512=83f0be38a1e21737de93f88b0adac15cdcc50cf712d773720b9bc1e8d8ffdb2c660d35840f25d326a42a9d4e6537e6cef466099bf72494196b2cc79977e703e3"
+  ]
+}
+x-commit-hash: "afbd6d2ee90b98cb0ea49cba34659e15b00cbfe3"
diff --git a/packages/lablgtk3-rsvg2/lablgtk3-rsvg2.3.1.5/opam b/packages/lablgtk3-rsvg2/lablgtk3-rsvg2.3.1.5/opam
new file mode 100644
index 00000000000..4584a41486d
--- /dev/null
+++ b/packages/lablgtk3-rsvg2/lablgtk3-rsvg2.3.1.5/opam
@@ -0,0 +1,37 @@
+opam-version: "2.0"
+
+synopsis: "OCaml interface to Gnome rsvg2 library"
+description: """
+OCaml interface to Gnome rsvg2 library.
+
+See https://garrigue.github.io/lablgtk/ for more information.
+"""
+
+maintainer: "garrigue@math.nagoya-u.ac.jp"
+authors: ["Jacques Garrigue et al., Nagoya University"]
+homepage: "https://github.com/garrigue/lablgtk"
+bug-reports: "https://github.com/garrigue/lablgtk/issues"
+dev-repo: "git+https://github.com/garrigue/lablgtk.git"
+doc: "https://garrigue.github.io/lablgtk/lablgtk3/lablgtk3-rsvg2"
+license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
+
+depends: [
+  "ocaml"                {         >= "4.12.0" }
+  "dune"                 {         >= "1.8.0"  }
+  "lablgtk3"             {          = version  }
+  "conf-librsvg2"        { build & >= "0"      }
+]
+
+build: [
+  [ "dune" "subst"] {pinned}
+  [ "dune" "build" "-p" name "-j" jobs ]
+]
+url {
+  src:
+    "https://github.com/garrigue/lablgtk/releases/download/3.1.5/lablgtk3-3.1.5.tbz"
+  checksum: [
+    "sha256=d4821cdbecf3ae374f20317d63e43fe58030c3ba9657b51a2e83e652197e8eac"
+    "sha512=83f0be38a1e21737de93f88b0adac15cdcc50cf712d773720b9bc1e8d8ffdb2c660d35840f25d326a42a9d4e6537e6cef466099bf72494196b2cc79977e703e3"
+  ]
+}
+x-commit-hash: "afbd6d2ee90b98cb0ea49cba34659e15b00cbfe3"
diff --git a/packages/lablgtk3-sourceview3/lablgtk3-sourceview3.3.1.5/opam b/packages/lablgtk3-sourceview3/lablgtk3-sourceview3.3.1.5/opam
new file mode 100644
index 00000000000..37524c8a263
--- /dev/null
+++ b/packages/lablgtk3-sourceview3/lablgtk3-sourceview3.3.1.5/opam
@@ -0,0 +1,38 @@
+opam-version: "2.0"
+
+synopsis: "OCaml interface to GTK+ gtksourceview library"
+description: """
+OCaml interface to GTK+3, gtksourceview3 library.
+
+See https://garrigue.github.io/lablgtk/ for more information.
+"""
+
+maintainer: "garrigue@math.nagoya-u.ac.jp"
+authors: ["Jacques Garrigue et al., Nagoya University"]
+homepage: "https://github.com/garrigue/lablgtk"
+bug-reports: "https://github.com/garrigue/lablgtk/issues"
+dev-repo: "git+https://github.com/garrigue/lablgtk.git"
+doc: "https://garrigue.github.io/lablgtk/lablgtk3/lablgtk3-sourceview3"
+license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
+
+depends: [
+  "ocaml"                {         >= "4.09.0" }
+  "dune"                 {         >= "1.8.0"  }
+  "lablgtk3"             {          = version  }
+  "conf-gtksourceview3"  { build & >= "0"      }
+  "camlp-streams"        { build               }
+]
+
+build: [
+  [ "dune" "subst"] {pinned}
+  [ "dune" "build" "-p" name "-j" jobs ]
+]
+url {
+  src:
+    "https://github.com/garrigue/lablgtk/releases/download/3.1.5/lablgtk3-3.1.5.tbz"
+  checksum: [
+    "sha256=d4821cdbecf3ae374f20317d63e43fe58030c3ba9657b51a2e83e652197e8eac"
+    "sha512=83f0be38a1e21737de93f88b0adac15cdcc50cf712d773720b9bc1e8d8ffdb2c660d35840f25d326a42a9d4e6537e6cef466099bf72494196b2cc79977e703e3"
+  ]
+}
+x-commit-hash: "afbd6d2ee90b98cb0ea49cba34659e15b00cbfe3"
diff --git a/packages/lablgtk3/lablgtk3.3.1.5/opam b/packages/lablgtk3/lablgtk3.3.1.5/opam
new file mode 100644
index 00000000000..73e61125bc6
--- /dev/null
+++ b/packages/lablgtk3/lablgtk3.3.1.5/opam
@@ -0,0 +1,43 @@
+opam-version: "2.0"
+
+synopsis: "OCaml interface to GTK+3"
+description: """
+OCaml interface to GTK+3
+
+See https://garrigue.github.io/lablgtk/ for more information.
+"""
+
+maintainer: "garrigue@math.nagoya-u.ac.jp"
+authors: ["Jacques Garrigue et al., Nagoya University"]
+homepage: "https://github.com/garrigue/lablgtk"
+bug-reports: "https://github.com/garrigue/lablgtk/issues"
+dev-repo: "git+https://github.com/garrigue/lablgtk.git"
+license: "LGPL-2.1-or-later WITH OCaml-LGPL-linking-exception"
+doc: "https://garrigue.github.io/lablgtk/lablgtk3/lablgtk3"
+
+depends: [
+  "ocaml"     {         >= "4.09.0" }
+  "camlp-streams" {     >= "5.0" & build }
+  "dune"      {         >= "1.8.0"  }
+  "cairo2"    {         >= "0.6"    }
+  "conf-gtk3" {         >= "18"     }
+  "ocamlfind" { dev                 }
+  "camlp5"    { dev                 }
+]
+
+build: [
+  [ "dune" "subst"] {pinned}
+  [ "dune" "build" "-p" name "-j" jobs ]
+]
+run-test: [
+  [ "dune" "build" "-p" name "-j" jobs "examples/buttons.exe" ]
+]
+url {
+  src:
+    "https://github.com/garrigue/lablgtk/releases/download/3.1.5/lablgtk3-3.1.5.tbz"
+  checksum: [
+    "sha256=d4821cdbecf3ae374f20317d63e43fe58030c3ba9657b51a2e83e652197e8eac"
+    "sha512=83f0be38a1e21737de93f88b0adac15cdcc50cf712d773720b9bc1e8d8ffdb2c660d35840f25d326a42a9d4e6537e6cef466099bf72494196b2cc79977e703e3"
+  ]
+}
+x-commit-hash: "afbd6d2ee90b98cb0ea49cba34659e15b00cbfe3"