0.8.4 Fails on macOS El Capitan
Seems the way our Github Action builds choosenim ends up failing on older macOS (or at least I hope it's just old ones).

```
» choosenim 1.4.8
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /Users/dom/.nimble/bin/choosenim
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /Users/dom/.nimble/bin/choosenim
  Expected in: /usr/lib/libSystem.B.dylib

[1]    5081 trace trap  choosenim 1.4.8
```

Building portable binaries is tough :/