anchor.diff:  , config ? {}
   , dconfig ? "testnet_staging_full"
   , gitrev ? "unknown"
  -, pkgs ? (import (localLib.fetchNixPkgs) { inherit system config; }) }:
  +, pkgs ? (import (localLib.fetchNixPkgs) { inherit system config; })
  +# profiling slows down performance by 50% so we don't enable it by default
  +, enableProfiling ? false
  +}:
   
   with pkgs.lib;
   with pkgs.haskell.lib;
  
positive.code:         else dontCheck super.fsnotify;
  
        mkDerivation = args: super.mkDerivation (args // {
          #enableLibraryProfiling = true;
        });
      };
    });
  
negative.code:         configureFlags = [
            "-f-asserts"
            "-f-dev-mode"
          ];
          testTarget = "--log=test.log || (sleep 10 && kill $TAILPID && false)";
          preCheck = ''
  