naga v1.0

Naga is a terminal implementation of snake game. URL: http://github.com/anayjoshi/naga.
This is a first time addition of this project in homebrew. The project has existed for quite some time, the github repository was refurnished today.
Now this is weird.
If I use `scons "install install_path=#{bin}"`, I get the output for brew install as:
```
==> Downloading http://github.com/anayjoshi/naga/archive/naga-v1.0.tar.gz
Already downloaded: /Library/Caches/Homebrew/naga-1.0.tar.gz
==> /usr/local/opt/scons/bin/scons install install_path=/usr/local/Cellar/naga/1.0/bin
  /usr/local/Cellar/naga/1.0: 3 files, 12K, built in 2 seconds
```
If I use `system "scons install install_path=#{bin}"`, I get output as:
```
==> Downloading http://github.com/anayjoshi/naga/archive/naga-v1.0.tar.gz
Already downloaded: /Library/Caches/Homebrew/naga-1.0.tar.gz
==> scons install install_path=/usr/local/Cellar/naga/1.0/bin
  /usr/local/Cellar/naga/1.0: 4 files, 28K, built in 2 seconds
```

Note that in the second case, 4 files were built & in the first case, 3 files were built. The file which was not built in the first case was the naga binary. => The first case works, the second doesn't.
Also, shouldn't the first case use `/usr/local/Cellar/scons/2.3.1/bin/scons` ?