diff --git a/pkgs/development/tools/misc/om4/default.nix b/pkgs/development/tools/misc/om4/default.nix
new file mode 100644
index 000000000000..30f1bb273fd3
--- /dev/null
+++ b/pkgs/development/tools/misc/om4/default.nix
@@ -0,0 +1,27 @@
+{ stdenv, fetchFromGitHub, bison, flex, lib }:
+
+stdenv.mkDerivation rec {
+  pname = "om4";
+  version = "6.7";
+
+  src = fetchFromGitHub {
+    owner = "ibara";
+    repo = "m4";
+    rev = "${pname}-${version}";
+    sha256 = "04h76hxwb5rs3ylkw1dv8k0kmkzl84ccqlwdwxb6i0x57rrqbgzx";
+  };
+
+  strictDeps = true;
+  nativeBuildInputs = [ bison flex ];
+
+  configureFlags = [ "--enable-m4" ];
+
+  meta = with lib; {
+    description = "Portable OpenBSD m4 macro processor";
+    homepage = "https://github.com/ibara/m4";
+    license = with licenses; [ bsd2 bsd3 isc publicDomain ];
+    mainProgram = "m4";
+    platforms = platforms.unix;
+    maintainers = [ maintainers.ninjin ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 925de57a0f21..cea0fd514050 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16193,6 +16193,8 @@ with pkgs;
   gnum4 = callPackage ../development/tools/misc/gnum4 { };
   m4 = gnum4;
 
+  om4 = callPackage ../development/tools/misc/om4 { };
+
   gnumake = callPackage ../development/tools/build-managers/gnumake { };
   gnumake42 = callPackage ../development/tools/build-managers/gnumake/4.2 { };