anchor.diff:  
       "LIBSEPOLA=${lib.getLib libsepol}/lib/libsepol.a"
       "ARCH=${stdenv.hostPlatform.linuxArch}"
  +  ] ++ optionals stdenv.hostPlatform.isStatic [
  +    "DISABLE_SHARED=y"
     ] ++ optionals enablePython [
       "PYTHON=${python3.pythonForBuild.interpreter}"
       "PYTHONLIBDIR=$(py)/${python3.sitePackages}"
  
positive.code: { lib, stdenv, fetchurl, pcre, pkg-config, libsepol
  , enablePython ? true, swig ? null, python3 ? null
  , fts
  }:
  
  
negative.code:     sha256 = "0mvh793g7fg6wb6zqhkdyrv80x6k84ypqwi8ii89c91xcckyxzdc";
    };
  
    patches = [
      # Make it possible to disable shared builds (for pkgsStatic).
      #
      # We can't use fetchpatch because it processes includes/excludes
      # /after/ stripping the prefix, which wouldn't work here because
      # there would be no way to distinguish between
      # e.g. libselinux/src/Makefile and libsepol/src/Makefile.
      #
      # This is a static email, so we shouldn't have to worry about
      # normalizing the patch.
      (fetchurl {
        url = "https://lore.kernel.org/selinux/20211113141616.361640-1-hi@alyssa.is/raw";
        sha256 = "16a2s2ji9049892i15yyqgp4r20hi1hij4c1s4s8law9jsx65b3n";
        postFetch = ''
          mv "$out" $TMPDIR/patch
          ${buildPackages.patchutils_0_3_3}/bin/filterdiff \
              -i 'a/libselinux/*' --strip 1 <$TMPDIR/patch >"$out"
        '';
      })
    ];
  
    nativeBuildInputs = [ pkg-config python3 ] ++ optionals enablePython [ swig ];
    buildInputs = [ libsepol pcre fts ] ++ optionals enablePython [ python3 ];
  
    # drop fortify here since package uses it by default, leading to compile error:
  