Humh, yes, because that's where project specific things go, but `install_phantomjs` should not go here...
I'll add a comment, but the `install_project` rule is meant to be overridden in the project itself, but should be called in the middle of the `install` chain, and this is the best way to always have this makefile rule exist, but still allow projects using `pywork4core` to actually override this rule.