anchor.diff:  };
   
   in appleDerivation {
  +  depsBuildBuild = [ buildPackages.stdenv.cc ];
     nativeBuildInputs = [ bsdmake perl bison flex ];
     buildInputs = [ flex ];
   
  
positive.code: { lib, appleDerivation, fetchzip, bsdmake, perl, flex, bison
  }:
  
  # this derivation sucks
  
negative.code: 
      bsdmake -C usr-share-locale.tproj
  
      ${stdenv.cc.targetPrefix}clang ${recentAdvCmds}/ps/*.c -o ps
    '';
  
    installPhase = ''
  