diff --git a/pkgs/development/libraries/libfreeaptx/default.nix b/pkgs/development/libraries/libfreeaptx/default.nix
index 648b6fac0df..cfc12024452 100644
--- a/pkgs/development/libraries/libfreeaptx/default.nix
+++ b/pkgs/development/libraries/libfreeaptx/default.nix
@@ -11,6 +11,8 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-eEUhOrKqb2hHWanY+knpY9FBEnjkkFTB+x6BZgMBpbo=";
   };
 
+  outputs = [ "out" "dev" ];
+
   postPatch = lib.optionalString stdenv.isDarwin ''
     substituteInPlace Makefile \
       --replace '-soname' '-install_name' \