1 files changed, 32 insertions, 0 deletions

diff --git a/overlays/postfwd.nix b/overlays/postfwd.nix
new file mode 100644
index 00000000..8a4f4bd8
--- /dev/null
+++ b/overlays/postfwd.nix
@@ -0,0 +1,32 @@
+{ final, prev, sources, ... }:
+let
+  deps = with final.perlPackages; [NetDNS NetServer IOMultiplex NetAddrIP NetCIDRLite DigestMD5 TimeHiRes Storable];
+in {
+  postfwd = prev.stdenv.mkDerivation rec {
+    inherit (sources.postfwd) pname version src;
+
+    nativeBuildInputs = with prev; [ makeWrapper ];
+    propagatedBuildInputs = [final.perlPackages.perl] ++ deps;
+
+    buildPhase = ''
+      runHook preBuild
+
+      substituteInPlace sbin/postfwd3 \
+        --replace "/usr/bin/perl -T" "/usr/bin/perl"
+
+      runHook postBuild
+    '';
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/bin
+      cp -t $out/bin sbin/postfwd3
+
+      wrapProgram $out/bin/postfwd3 \
+        --prefix PERL5LIB : ${final.perlPackages.makePerlPath deps}
+
+      runHook postInstall
+    '';
+  };
+}