anchor.diff:    '';
   
     postFixup = ''
  -    for tgt in pon poff plog; do
  -      substituteInPlace "$out/bin/$tgt" --replace "/usr/sbin" "$out/bin"
  -    done
  +    substituteInPlace "$out/bin/pon" --replace "/usr/sbin" "$out/bin"
     '';
   
     meta = with lib; {
  
positive.code: , substituteAll
  , libpcap
  , openssl
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:   buildInputs = [
      libpcap
      openssl
      bash
    ];
  
    postPatch = ''
      for file in $(find -name Makefile.linux); do
        substituteInPlace "$file" --replace '-m 4550' '-m 550'
      done
  
      patchShebangs --host \
        scripts/{pon,poff,plog}
    '';
  
    makeFlags = [
      "CC=${stdenv.cc.targetPrefix}cc"
    ];
  
    installPhase = ''
      runHook preInstall
  