anchor.diff:    patchPhase = ''
       substituteInPlace Makefile.in \
         --replace "command -p mv" "mv"
  +    substituteInPlace configure \
  +      --replace "command -p getconf PATH" "echo $PATH"
     '';
   
     postInstall = ''
  
positive.code: in
  stdenv.mkDerivation rec {
    pname = "tarsnap";
    version = "1.0.39";
  
    src = fetchurl {
      url = "https://www.tarsnap.com/download/tarsnap-autoconf-${version}.tgz";
      sha256 = "10i0whbmb345l2ggnf4vs66qjcyf6hmlr8f4nqqcfq0h5a5j24sn";
    };
  
    preConfigure = ''
  
negative.code: { lib, stdenv, fetchurl, openssl, zlib, e2fsprogs, bash }:
  
  let
    zshCompletion = fetchurl {
  