anchor.diff:    # masss-rebuild.
     crossConfig = true;
   
  -  nativeBuildInputs = [ alex autoconf automake ghc happy hscolour perl python3 sphinx ];
  +  nativeBuildInputs = [ alex autoconf autoreconfHook automake ghc happy hscolour perl python3 sphinx ];
   
     # For building runtime libs
     depsBuildTarget = toolsForTarget;
  
positive.code: 
    outputs = [ "out" "doc" ];
  
    postPatch = "patchShebangs .";
  
    # GHC is a bit confused on its cross terminology.
  
negative.code: 
  # build-tools
  , bootPkgs, alex, happy, hscolour
  , autoconf, autoreconfHook, automake, coreutils, fetchurl, fetchpatch, perl, python3, sphinx
  
  , libffi, libiconv ? null, ncurses
  
  