Cannot install from Homebrew

[inkel]

Hey, dear @foca.

I tried to install today this tool using brew install foca/mpp/mpp but I've got a few issues. The first one being that the install failed with the issue solved in 86cc7a1; for some reason, it was still trying to use crystal compile on my machine.

I was able to hack the crystal wrapper to fix this issue, but then I'm getting this new error:

inkel@rivendel:~ $ brew install foca/mpp/mpp
==> Installing mpp from foca/mpp
==> Downloading https://github.com/foca/mpp/archive/v1.0.0.rc3.tar.gz
Already downloaded: /Users/inkel/Library/Caches/Homebrew/downloads/e477525372606dea1f8b0156f93e254831b1aec526aec317804370ad53d2ff5f--mpp-1.0.0.rc3.tar.gz
==> ./configure --prefix=/usr/local/Cellar/mpp/1.0.0.rc3
==> make
Last 15 lines from /Users/inkel/Library/Logs/Homebrew/mpp/02.make:
2020-02-13 14:21:46 -0300

make

echo 'MPP_VERSION = "1.0.0.rc3"' > src/version.cr
mkdir -p bin
crystal compile -o bin/mpp src/mpp.cr
Showing last frame. Use --error-trace for full trace.

In src/path.cr:1:7

 1 | class Path
           ^
Error: Path is not a class, it's a struct
make: *** [bin/mpp] Error 1

If reporting this issue please do so at (not Homebrew/brew or Homebrew/core):
  https://github.com/foca/homebrew-mpp/issues

Any ideas on what could it be?

Thanks!