`make tips` outdated?

[ebfe]

$ make tips
[...]
# This is hardly all there is to know of The Rust Build System's
# mysteries. The tale continues on the wiki[1][2].
#
# [1]: https://github.com/rust-lang/rust/wiki/Note-build-system
# [2]: https://github.com/rust-lang/rust/wiki/Note-testsuite
#
# If you really feel like getting your hands dirty, then:
#
#     run `make nitty-gritty`
#

However [1] points to an empty wiki page. Is this information available
somewhere else now?

[brson]

Seems that info no longer exists.

[steveklabnik]

@brson if you see #18399, there's a sample of information that could replace it.