Need to specify the install prefix to make sure it gets installed in the right location. This will be set for you if you add Homebrew's default cmake parameters: `system "cmake", "-DCMAKE_BUILD_TYPE=Release", *std_cmake_args`

It sets:

```
      -DCMAKE_INSTALL_PREFIX=#{prefix}
      -DCMAKE_BUILD_TYPE=None
      -DCMAKE_FIND_FRAMEWORK=LAST
      -DCMAKE_VERBOSE_MAKEFILE=ON
      -Wno-dev
```