For installing bob from source, there is a script provided here: https://gitlab.idiap.ch/bob/bob/blob/10e4995c5f68f79f2ddbba4feb4b1cc52880753c/doc/source.rst In this script, 8 levels of bob packages are listed. While the first seven levels of packages install all bob packages in the latest versions, the last level, which only includes `bob` removes some of the previously installed packages and replaces them with older versions, which are pin-pointed in the `bob` package. Is there any reason why the `bob` package is mentioned in the last stage? Wouldn't it make more sense to remove that?