That wiki page is ridiculous. People tell you that they want to build only udev because they don't need the rest and they'd like to avoid installing all systemd dependencies just to get a system component that's not dependent on systemd at all and your answer is:
a) restating the problem as a solution
b) suggesting that they create arbitrary empty files who could change at any time if the dependencies list change and then mess with the environment, not exactly the easier thing to do for a build system (and it doesn't even work always!)
And finally you end by saying that you're open to all patches but the patch that would solve the problem. Remove that page, there's no need to mock people.