diff --git a/pkgs/development/libraries/libwmf/default.nix b/pkgs/development/libraries/libwmf/default.nix
index e7aa5f7ecc9f..5c684c7fd778 100644
--- a/pkgs/development/libraries/libwmf/default.nix
+++ b/pkgs/development/libraries/libwmf/default.nix
@@ -6,6 +6,8 @@ stdenv.mkDerivation rec {
   pname = "libwmf";
   version = "0.2.12";
 
+  outputs = [ "out" "dev" ];
+
   src = fetchFromGitHub {
     owner = "caolanm";
     repo = pname;