Add `ODIN_ROOT` information

bin/README.md

@@ -23,6 +23,7 @@ In addition, the following platform-specific steps are necessary:
 
 Then build the compiler by calling `build.bat` (Windows) or `make` (Linux/MacOS). This will automatically run the demo program if successful.
 
-**Notes for Linux:**: The compiler currently relies on the `core` and `shared` library collection being relative to the compiler executable. Installing the compiler in the usual sense (to `/usr/local/bin` or similar) is therefore not as straight forward as you need to make sure the mentioned libraries are available. As a result, it is recommended to simply explicitly invoke the compiler with `/path/to/odin` in your preferred build system, or add `/path/to/odin` to `$PATH`.
+**Notes for \*Nix Systems:**: The compiler currently relies on the `core` and `shared` library collection being relative to the compiler executable, by default. Installing the compiler in the usual sense (to `/usr/local/bin` or similar) is therefore not as straight forward as you need to make sure the mentioned libraries are available. As a result, it is recommended to either simply explicitly invoke the compiler with `/path/to/odin` in your preferred build system, or `set ODIN_ROOT=/path/to/odin_root`.
+
 
 Please read the [Getting Started Guide](https://github.com/odin-lang/Odin/wiki#getting-started-with-odin) for more information.