When trying to evaluate a Nimble file which imports a Nim module
I was getting the following errors for some reason:
```
/Users/dom/projects/nim/lib/pure/parseopt.nim(229, 46) Error: ambiguous call; both system.paramCount() [declared in /Users/dom/projects/nim/lib/system/nimscript.nim(65, 6)] and os.paramCount() [declared in /Users/dom/projects/nim/lib/pure/os.nim(2613, 8)] match for: ()
```
(cherry picked from commit bab5351d43)
5937c40928