I agree, but think that's what the code does.  If you specify `--manifest` then we should have `len(options.manifest) > 0`.  then `manifestFiles()` returns just that file name.  Then `getContainers()` will expect that file to exist (since it's only passed one name in the array to try), and fail with:
```
	panic(fmt.Sprintf("No configuration found %v", manifestFiles()))
```
if not.