diff --git a/pkgs/applications/display-managers/lightdm/default.nix b/pkgs/applications/display-managers/lightdm/default.nix
index 6947a010a0ef..bec07ac2d506 100644
--- a/pkgs/applications/display-managers/lightdm/default.nix
+++ b/pkgs/applications/display-managers/lightdm/default.nix
@@ -13,6 +13,8 @@ stdenv.mkDerivation rec {
 
   name = "${pname}-${version}";
 
+  outputs = [ "out" "dev" ];
+
   src = fetchFromGitHub {
     owner = "CanonicalLtd";
     repo = pname;