- specifying a variants file has been replaced by a more flexible 'flavor' implementation
- 'ModuleGroup' has been renamed to 'GROUP'
- bugfix in setting 'PREFIX'
- a variants file must exist
- '--with' arguments are used to select a variant only not to load a module
- a SHA256 hash-sum can now be passed as second argument to set_download_url()
- a (relative) output file-name can now be passed as third argument to set_download_url()
- '{set,add}_docfile*()' have been replaced by 'install_docfiles()'
- build dependencies are now written to the doc-directory
- build script and variants file are installed in doc-directory