anchor.diff:  , lr, xe, zip, unzip, bash, writeCBin, coreutils
   , which, gawk, gnused, gnutar, gnugrep, gzip, findutils
   # updater
  -, python3, writeScript
  +, python27, python3, writeScript
   # Apple dependencies
   , cctools, libcxx, CoreFoundation, CoreServices, Foundation
   # Allow to independently override the jdks used to build and run respectively
  
positive.code:         # Only files containing /bin are taken into account.
          substituteInPlace "$path" \
            --replace /bin/bash ${customBash}/bin/bash \
            --replace /usr/bin/env ${coreutils}/bin/env \
            --replace /bin/true ${coreutils}/bin/true
        done
  
negative.code:     '';
  
      genericPatches = ''
        # Substitute j2objc and objc wrapper's python shebang to plain python path.
        # See also `postFixup` where python is added to $out/nix-support
        substituteInPlace tools/j2objc/j2objc_header_map.py --replace "$!/usr/bin/python2.7" "#!${python27}/bin/python"
        substituteInPlace tools/j2objc/j2objc_wrapper.py --replace "$!/usr/bin/python2.7" "#!${python27}/bin/python"
        substituteInPlace tools/objc/j2objc_dead_code_pruner.py --replace "$!/usr/bin/python2.7" "#!${python27}/bin/python"
  
        # md5sum is part of coreutils
        sed -i 's|/sbin/md5|md5sum|' \
  