anchor.diff:      splitString
       tail;
   
  -  version = "3.22.0";
  +  version = "3.23.0";
     releaseYear = "2018";
     versionList = splitString "." version;
     version' = "${head versionList}${fixedWidthString 2 "0" (head (tail versionList))}"
  
positive.code: 
  , readline
  , ncurses
  }:
  
  let
  
negative.code:   passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        sha1Confirm = "ef55baa06f46808b9798f8447ba6a0115b23c5d2";
        inherit (src) urls outputHash outputHashAlgo;
      };
    };
  