anchor.diff:    passthru = {
       srcVerification = fetchurl {
         failEarly = true;
  -      pgpsigUrls = map (n: "${n}.asc") src.urls;
  -      pgpKeyFingerprint = "ED31 791B 2C5C 1613 AF38  8B8A D113 FCAC 3C4E 599F";
  -      inherit (src) urls outputHash outputHashAlgo;
  +      inherit (src)
  +        urls
  +        outputHash
  +        outputHashAlgo;
  +      fullOpts = {
  +        pgpsigUrls = map (n: "${n}.asc") src.urls;
  +        pgpKeyFingerprint = "ED31 791B 2C5C 1613 AF38  8B8A D113 FCAC 3C4E 599F";
  +      };
       };
     };
   
  
positive.code: }:
  
  let
    version = "3.4.0";
  in
  stdenv.mkDerivation rec {
    name = "sshfs-${version}";
  
negative.code:   src = fetchurl {
      url = "https://github.com/libfuse/sshfs/releases/download/${name}/${name}.tar.xz";
      hashOutput = false;
      sha256 = "c2035332489dea3be88b9328d0e1905f904a34f93eb87fb07cd5380329a3dfe5";
    };
  
    nativeBuildInputs = [
  