beginner's experience cannot run
I am having trouble getting anything running on Mac, nim version `0.20.2 [MacOSX: amd64]`. Initially I had to track down and understand what [nake](https://github.com/fowlmouth/nake) was, so it might be worth mentioning what nake is in the readme?

Firstly I tried running the nimx samples as instructed `nim c -r nakefile.nim` (I didn't use the `nake` binary invocation because I couldn't create it - [see issue](https://github.com/fowlmouth/nake/issues/69)) I get

```
...
Hint: operation successful (105010 lines compiled; 6.867 sec total; 138.188MiB peakmem; Debug Build) [SuccessX]
Hint: /Users/Andy/Devel/nim_demos/nimx/nakefile  [Exec]
No task specified, running default task defined by nakefile.
/Users/Andy/.nimble/pkgs/nake-1.9.3/nake.nim(93) moduleHook
/Users/Andy/.nimble/pkgs/nake-1.9.3/nakelib.nim(252) runTask
/Users/Andy/Devel/nim_demos/nimx/nimx/naketools.nim(940) :anonymous
/Users/Andy/Devel/nim_demos/nimx/nimx/naketools.nim(293) newBuilder
/Users/Andy/Devel/nim_demos/nimx/nimx/naketools.nim(257) newBuilder
/Users/Andy/.nimble/pkgs/plists-0.1.0/plists.nim(80) loadPlist
/usr/local/Cellar/nim/0.20.2/nim/lib/pure/xmlparser.nim(146) loadXml
/usr/local/Cellar/nim/0.20.2/nim/lib/pure/xmlparser.nim(138) loadXml
Error: unhandled exception: Unable to read file: /Applications/Xcode.app/Contents/Developer/SDKs/MacOSX.sdk/SDKSettings.plist [IOError]
Error: execution of an external program failed: '/Users/Andy/Devel/nim_demos/nimx/nakefile '
```

Then I tried running the main example `nim c -r --threads:on main.nim` I get

```
...
Hint: font [Processing]
Hint: streams [Processing]
/Users/Andy/Devel/nim_demos/nimx/nimx/font.nim(3, 13) Error: cannot open file: nimx/types
A
```

Any Ideas of what I am doing wrong?

