diff --git a/pkgs/development/libraries/glew/default.nix b/pkgs/development/libraries/glew/default.nix
index 57bb4cb631d4..38b303bde856 100644
--- a/pkgs/development/libraries/glew/default.nix
+++ b/pkgs/development/libraries/glew/default.nix
@@ -19,8 +19,9 @@ stdenv.mkDerivation rec {
 
   patchPhase = ''
     sed -i 's|lib64|lib|' config/Makefile.linux
+    substituteInPlace config/Makefile.darwin --replace /usr/local "$out"
     ${optionalString (hostPlatform != buildPlatform) ''
-    sed -i -e 's/\(INSTALL.*\)-s/\1/' Makefile
+      sed -i -e 's/\(INSTALL.*\)-s/\1/' Makefile
     ''}
   '';
 
@@ -43,6 +44,8 @@ stdenv.mkDerivation rec {
     "SYSTEM=${if hostPlatform.isMinGW then "mingw" else hostPlatform.parsed.kernel.name}"
   ];
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "An OpenGL extension loading library for C(++)";
     homepage = http://glew.sourceforge.net/;