anchor.diff:  
     patchPhase = ''
       sed -i 's|lib64|lib|' config/Makefile.linux
  +    ${optionalString (stdenv ? cross) ''
  +    sed -i -e 's/\(INSTALL.*\)-s/\1/' Makefile
  +    ''}
     '';
   
   buildPhase = "make all";
  
positive.code: { stdenv, fetchurl, mesa_glu, x11, libXmu, libXi }:
  
  stdenv.mkDerivation rec {
    name = "glew-1.10.0";
  
negative.code:     cp -r README.txt LICENSE.txt doc $out/share/doc/glew
    '';
  
    crossAttrs.makeFlags = [
      "CC=${stdenv.cross.config}-gcc"
      "LD=${stdenv.cross.config}-gcc"
      "AR=${stdenv.cross.config}-ar"
      "STRIP="
    ] ++ optional (stdenv.cross.libc == "libSystem") "SYSTEM=darwin";
  
    meta = {
      description = "An OpenGL extension loading library for C(++)";
      homepage = http://glew.sourceforge.net/;
  