diff --git a/pkgs/development/libraries/pangolin/default.nix b/pkgs/development/libraries/pangolin/default.nix
index 4618a6d43187..5e8ec502a65f 100644
--- a/pkgs/development/libraries/pangolin/default.nix
+++ b/pkgs/development/libraries/pangolin/default.nix
@@ -1,11 +1,10 @@
 { stdenv, lib, fetchFromGitHub, cmake, pkg-config, doxygen, libGL, glew
 , xorg, ffmpeg_4, libjpeg, libpng, libtiff, eigen
-, Carbon ? null, Cocoa ? null
+, Carbon, Cocoa
 }:
 
 stdenv.mkDerivation rec {
   pname = "pangolin";
-
   version = "0.9.1";
 
   src = fetchFromGitHub {