diff --git a/nix/gnutoolchain.nix b/nix/gnutoolchain.nix
index 0a00a56..0811c63 100644
--- a/nix/gnutoolchain.nix
+++ b/nix/gnutoolchain.nix
@@ -3,7 +3,7 @@ let
 
 platform = "arm-none-eabi";
 
-binutils-pkg = { stdenv, buildPackages
+binutils-pkg = { stdenv, lib, buildPackages
 , fetchurl, zlib
 , extraConfigureFlags ? []
 }:
@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
       `gprof', `nm', `strip', etc.
     '';
     homepage = http://www.gnu.org/software/binutils/;
-    license = stdenv.lib.licenses.gpl3Plus;
+    license = lib.licenses.gpl3Plus;
     /* Give binutils a lower priority than gcc-wrapper to prevent a
        collision due to the ld/as wrappers/symlinks in the latter. */
     priority = "10";