anchor.diff:    installPhase = ''
       mkdir -p "$out/bin"
       cp -a usr/* "$out/"
  -    interpreter="$(echo ${stdenv.glibc.out}/lib/ld-linux*)"
  -    patchelf --set-interpreter "$interpreter" "$out/bin/xidel"
  -    patchelf --set-rpath "${stdenv.lib.makeLibraryPath [stdenv.glibc]}" "$out/bin/xidel"
  +    patchelf --set-interpreter "$(cat $NIX_CC/nix-support/dynamic-linker)" "$out/bin/xidel"
     '';
   
     meta = with stdenv.lib; {
  
positive.code: { stdenv, fetchurl, dpkg, patchelf }:
  
  stdenv.mkDerivation rec {
    name = "xidel-${version}";
  
negative.code:       }
      else throw "xidel is not supported on ${stdenv.system}";
  
    buildInputs = [ dpkg ];
  
    unpackPhase = ''
      dpkg-deb -x ${src} ./
  