diff --git a/pkgs/development/libraries/epoxy/default.nix b/pkgs/development/libraries/epoxy/default.nix
index 66039daa4792..ccbf45796840 100644
--- a/pkgs/development/libraries/epoxy/default.nix
+++ b/pkgs/development/libraries/epoxy/default.nix
@@ -13,6 +13,8 @@ stdenv.mkDerivation rec {
     sha256 = "0dfkd4xbp7v5gwsf6qwaraz54yzizf3lj5ymyc0msjn0adq3j5yl";
   };
 
+  outputs = [ "dev" "out" ];
+
   nativeBuildInputs = [ autoreconfHook pkgconfig utilmacros python ];
   buildInputs = [ mesa libX11 ];