anchor.diff:      sha256 = "1fn4wx6pjmy899qjg7nq0sm66ky3ll69mdica0h7577sgsldm9cm";
     };
   
  +  buildPhase = ''
  +    patchShebangs .
  +  '';
  +
     installPhase = ''
       source $stdenv/setup
       set -e
  
positive.code:     mkdir -p $out/bin
      cp       $src/${name}    $out/bin
      chmod +x $out/bin/${name}
  
      wrapProgram $out/bin/${name} --prefix PATH : ${stdenv.lib.makeBinPath [
        python36
        bubblewrap
        nix
      ]}
    '';
  
    meta = {
  
negative.code: 
    name = "nix-cage";
  
    buildInputs = [ python36 bubblewrap nix ];
  
    src = fetchFromGitHub {
      owner  = "corpix";
  