[Source](https://github.com/AcademySoftwareFoundation/rez/tree/2.70.0) | [Diff](https://github.com/AcademySoftwareFoundation/rez/compare/2.69.7...2.70.0)
**Backwards Compatibility Issues**
This release **removes the bez build system**. This was a very simple build system that does nothing more
than call a function in `rezbuild.py`, passing it some build attributes (such as installation path). It has
been removed because you can achieve the same thing using a custom build command, and you can retrieve the
build attributes from environment variables instead.
If you attempt to build a package that was previously using bez (ie, the `rezbuild.py` script is still there,
and `build_command` is not specified in your package.py) then the resulting error message shows you what you
need to do to port your existing build script.
**Merged pull requests:**
- Remove bez [\979](https://github.com/AcademySoftwareFoundation/rez/pull/979) ([nerdvegas](https://github.com/nerdvegas))