#macOS Command Line Tools 15.3.0.0.1.1708646388 somehow ships without m4 or yacc.

#pkgsrc has a "tools" abstraction to deal with this, so we've dealt with it: https://github.com/NetBSD/pkgsrc/commit/b889d0bc0d9edd0d04311ec0c36de73ed644ab4d
1254406

Passed by: 33MHz