anchor.diff:        "mirror://gnu/nano/${name}.tar.xz"
       ];
       hashOutput = false;
  -    sha256 = "7783bcfd4b2d5dc0bf64d4bd07b1a19e7ba3c91da881a4249772a36b972d4012";
  +    sha256 = "2cf9726e735f5c962af63d27c2faaead5936e45adec983659fb9e4af88ffa35a";
     };
   
     nativeBuildInputs = [
  
positive.code:     srcVerification = fetchurl {
        failEarly = true;
        pgpsigUrls = map (n: "${n}.asc") src.urls;
        pgpKeyFingerprint = "A7F6 A64A 67DA 09EF 9278  2DD7 9DF4 862A F117 5C5B ";
        inherit (src) urls outputHash outputHashAlgo;
      };
    };
  
negative.code: 
  let
    channel = "2.9";
    version = "${channel}.4";
  in
  stdenv.mkDerivation rec {
    name = "nano-${version}";
  