anchor.diff:  { stdenv
   , fetchurl
   , flex
  +, lib
   }:
   
   let
  -  se_release = "20160223";
  -  se_url = "https://raw.githubusercontent.com/wiki/SELinuxProject/selinux/files/releases";
  -
  +  release = "20160223";
     version = "2.5";
   in
   stdenv.mkDerivation rec {
     name = "libsepol-${version}";
   
     src = fetchurl {
  -    url = "${se_url}/${se_release}/libsepol-${version}.tar.gz";
  +    url = "https://raw.githubusercontent.com/wiki/SELinuxProject/selinux/"
  +      + "files/releases/${release}/${name}.tar.gz";
       sha256 = "2bdeec56d0a08b082b93b40703b4b3329cc5562152f7254d8f6ef6b56afe850a";
     };
   
  
positive.code:     )
    '';
  
    passthru = {
      inherit se_release se_url;
    };
  
    meta = with stdenv.lib; {
      homepage = http://userspace.selinuxproject.org;
      platforms = platforms.linux;
      maintainers = [ maintainers.phreedom ];
      license = stdenv.lib.licenses.gpl2;
    };
  }
  
negative.code:     flex
    ];
  
    NIX_CFLAGS_COMPILE = [
      "-Wno-error"
    ];
  
    preBuild = ''
      makeFlagsArray+=(
  