diff --git a/pkgs/development/python-modules/moderngl/default.nix b/pkgs/development/python-modules/moderngl/default.nix
index 447d2b00b019..461a4a39e88a 100644
--- a/pkgs/development/python-modules/moderngl/default.nix
+++ b/pkgs/development/python-modules/moderngl/default.nix
@@ -18,7 +18,8 @@ buildPythonPackage rec {
 
   disabled = !isPy3k;
 
-  buildInputs = [ libGL libX11 glcontext ];
+  buildInputs = [ libGL libX11 ];
+  propagatedBuildInputs = [ glcontext ];
 
   # Tests need a display to run.
   doCheck = false;