anchor.diff:  
     src = fetchurl {
       url = "https://www.python.org/ftp/python/${majorVersion}.${minorVersion}/Python-${version}.tar.xz";
  -    sha256 = "08c3598bwihibwca9lwxq923sjq9shvgv3wxv4vkga2n6hf63l1c";
  +    sha256 = "0hjdlwkjanjagz4qggbfgal8ggmas26mx2jlgjx1z2mzi950jfx8";
     };
   
     NIX_LDFLAGS = optionalString stdenv.isLinux "-lgcc_s";
  
positive.code:        export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -msse2"
         export MACOSX_DEPLOYMENT_TARGET=10.6
       ''}
  
      substituteInPlace ./Lib/plat-generic/regen --replace "/usr/include" ${glibc.dev}/include
  
      configureFlagsArray=( --enable-shared --with-threads
                            CPPFLAGS="${concatStringsSep " " (map (p: "-I${getDev p}/include") buildInputs)}"
  
negative.code: let
    majorVersion = "3.6";
    minorVersion = "0";
    minorVersionSuffix = "b1";
    pythonVersion = majorVersion;
    version = "${majorVersion}.${minorVersion}${minorVersionSuffix}";
    libPrefix = "python${majorVersion}";
  