cannot open $HOME/.nimble/lib/system.nim
Freshly installed copy, trying to build https://github.com/evacchi/nimoy on macOS Sierra

     Error: Traceback (most recent call last)
        ... nimble.nim(1073)         nimble
        ... nimble.nim(991)          doAction
        ... nimble.nim(973)          execHook
        ... packageparser.nim(313)   getPkgInfoFromFile
        ... packageparser.nim(288)   readPackageInfo
        ... Could not read package info file in <OMISSIS>/nimoy/nimoy.nimble;
        ...   Reading as ini file failed with:
        ...     Invalid section: .
        ...   Evaluating as NimScript file failed with:
        ...     Error: cannot open '/Users/evacchi/.nimble/lib/system.nim'.

in fact the file is missing

```
% ls /Users/evacchi/.nimble/lib/system.nim                                        
ls: /Users/evacchi/.nimble/lib/system.nim: No such file or directory
```