diff --git a/packages/conf-pkg-config/conf-pkg-config.4/opam b/packages/conf-pkg-config/conf-pkg-config.4/opam
new file mode 100644
index 00000000000..8ec78cb8228
--- /dev/null
+++ b/packages/conf-pkg-config/conf-pkg-config.4/opam
@@ -0,0 +1,38 @@
+opam-version: "2.0"
+maintainer: "unixjunkie@sdf.org"
+authors: ["Francois Berenger"]
+homepage: "http://www.freedesktop.org/wiki/Software/pkg-config/"
+bug-reports: "https://github.com/ocaml/opam-repository/issues"
+license: "GPL-1.0-or-later"
+depends: [
+  ("host-arch-x86_64" {os = "win32" & os-distribution = "msys2"} & "conf-mingw-w64-pkgconf-x86_64" {os = "win32" & os-distribution = "msys2"} |
+   "host-arch-x86_32" {os = "win32" & os-distribution = "msys2"} & "conf-mingw-w64-pkgconf-i686" {os = "win32" & os-distribution = "msys2"})
+]
+build: [
+  ["pkg-config" "--help"] {os != "openbsd" & os != "win32" & !(os = "macos" & os-distribution = "homebrew")}
+  ["pkgconf" "--version"] {(os = "win32" & os-distribution != "msys2") | (os = "macos" & os-distribution = "homebrew")}
+]
+depexts: [
+  ["pkg-config"] {os-family = "debian" | os-family = "ubuntu"}
+  ["pkgconf"] {os-distribution = "arch"}
+  ["pkgconf-pkg-config"] {os-distribution = "fedora"}
+  ["pkgconfig"] {os-distribution = "centos" & os-version <= "7"}
+  ["pkgconf-pkg-config"] {os-distribution = "mageia"}
+  ["pkgconfig"] {os-distribution = "rhel" & os-version <= "7"}
+  ["pkgconfig"] {os-distribution = "ol" & os-version <= "7"}
+  ["pkgconf"] {os-distribution = "alpine"}
+  ["pkg-config"] {os-distribution = "nixos"}
+  ["pkgconf"] {os = "macos" & os-distribution = "homebrew"}
+  ["pkgconfig"] {os = "macos" & os-distribution = "macports"}
+  ["pkgconf"] {os = "freebsd"}
+  ["pkgconf-pkg-config"] {os-distribution = "rhel" & os-version >= "8"}
+  ["pkgconf-pkg-config"] {os-distribution = "centos" & os-version >= "8"}
+  ["pkgconf-pkg-config"] {os-distribution = "ol" & os-version >= "8"}
+  ["system:pkgconf"] {os = "win32" & os-distribution = "cygwinports"}
+  ["pkgconf"] {os-distribution = "cygwin"}
+]
+synopsis: "Check if pkg-config is installed and create an opam switch local pkgconfig folder"
+description: """
+This package can only install if the pkg-config package is installed
+on the system."""
+flags: conf