anchor.diff:        ##
         ## Extra custom steps
         ##
  -
  -    ''
  +    ''
  +
       + extraBuildCommands;
   
     inherit expand-response-params;
  
positive.code: 
    inherit targetPrefix infixSalt;
  
    outputs = [ "out" "man" ];
  
    passthru = {
      # "cc" is the generic name for a C compiler, but there is no one for package
  
negative.code: # script that sets up the right environment variables so that the
  # compiler and the linker just "work".
  
  { name ? ""
  , stdenvNoCC, nativeTools, propagateDoc ? !nativeTools, noLibc ? false, nativeLibc, nativePrefix ? ""
  , cc ? null, libc ? null, bintools, coreutils ? null, shell ? stdenvNoCC.shell
  , zlib ? null, extraPackages ? [], extraBuildCommands ? ""
  , isGNU ? false, isClang ? cc.isClang or false, gnugrep ? null
  