diff --git a/pkgs/development/python-modules/pyglet/default.nix b/pkgs/development/python-modules/pyglet/default.nix
index 62c8598f5918..21ecabb0ff86 100644
--- a/pkgs/development/python-modules/pyglet/default.nix
+++ b/pkgs/development/python-modules/pyglet/default.nix
@@ -62,7 +62,7 @@ buildPythonPackage rec {
             elif name == 'freetype':
                 path = '${freetype}/lib/libfreetype${ext}'
             elif name[0:2] == 'av' or name[0:2] == 'sw':
-                path = '${ffmpeg-full}/lib/lib' + name + '${ext}'
+                path = '${lib.getLib ffmpeg-full}/lib/lib' + name + '${ext}'
             elif name == 'openal':
                 path = '${openal}/lib/libopenal${ext}'
             elif name == 'pulse':