diff --git a/shell.nix b/shell.nix
index 3a48aac..d040461 100644
--- a/shell.nix
+++ b/shell.nix
@@ -22,7 +22,7 @@ let
       ];
       homepage = "https://github.com/nek0/affection#readme";
       description = "A simple Game Engine using SDL";
-      license = stdenv.lib.licenses.lgpl3;
+      license = pkgs.lib.licenses.lgpl3;
     }) {};
 
   f = { mkDerivation, aeson, base, bytestring, containers, derive-storable
@@ -37,7 +37,7 @@ let
         executableHaskellDepends = [ aeson affection base bytestring containers
         derive-storable JuicyPixels JuicyPixels-extra linear monad-loops OpenGL
         OpenGLRaw sdl2 StateVar stm text vector];
-        license = stdenv.lib.licenses.gpl3;
+        license = pkgs.lib.licenses.gpl3;
       };
 
   haskellPackages = if compiler == "default"