anchor.diff:      splitString
       tail;
   
  -  version = "3.20.0";
  +  version = "3.20.1";
     releaseYear = "2017";
     versionList = splitString "." version;
     version' = "${head versionList}${fixedWidthString 2 "0" (head (tail versionList))}"
  
positive.code:   passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        sha1Confirm = "2a451bcf42dc0865840463f7efc3f51cebeb4ea8";
        inherit (src) urls outputHash outputHashAlgo;
      };
    };
  
negative.code: 
    src = fetchurl {
      url = "https://sqlite.org/${releaseYear}/sqlite-autoconf-${version'}.tar.gz";
      multihash = "QmWC5UnAHn7h3wWv7n31Sdusm2TdiFTTJLBYGQb16632sr";
      hashOutput = false;
      sha256 = "ec66595b29bc0798b023a5122021ea646ab4fa9e2f735937c5426feeba950742";
    };
  
    buildInputs = [
  