anchor.diff:    }
   
     if (pubspecPathsToUpdate.length > 0) _pubUpdate(pubspecPathsToUpdate);
  -  _setupIsolate(path.join(workerFolder, START_NAME));
  +  await _setupIsolate(path.join(workerFolder, START_NAME));
   
     log.debug("Isolate started with sha: $sha");
     shaCodeRunningInIsolate = sha;
  
positive.code: 
    isolate =
        await Isolate.spawnUri(Uri.parse(startPath), [], receivePort.sendPort);
    isolate.setErrorsFatal(false);
    log.info("Worker isolate spawned");
  }
  
negative.code:   }
  }
  
  _ensureSourceIsInstalled(Map<String, String> codeMap) async {
    String sha = computeCodeSha(codeMap);
  
    log.trace("Performing _ensureSourceInstalled: $sha");
  