anchor.diff:  
       # Run the library tests as they don't have external dependencies
       doCheck = true;
  +    checkInputs = lib.optionals stdenv.isDarwin [ getconf ];
       checkPhase = ''
         runHook preCheck
         # test list repeats suites. Unique them
  
positive.code:       dontBuild = true; # we've already built
  
        doCheck = true;
        checkPhase = ''
          runHook preCheck
          bash ./test.sh --compiled --suite ${name}
  
negative.code: { lib, stdenv, fetchFromGitHub, bash, makeWrapper, bat
  # batdiff, batgrep, and batwatch
  , coreutils
  , getconf
  , less
  # batgrep
  , ripgrep
  