Previously, cabal-install had a custom Setup.hs which took care of
generating and installing the cabal(1) man page. While this file was a
bit of scary sight, it is certainly nice to have a man page properly
installed. For the 3.2.0.0 release they switched to the default setup
type again, so the man page isn't installed anymore. Fortunately the
cabal cli can generate the man page as well, so the override to add the
man page back is pretty simple.
The commit that introduced this is the following:
91ac075930
I actually made a mental note of this a few weeks ago already, but it
slipped my mind when we updated to cabal-install 3.2.0.0 two weeks ago
unfortunately.
404e61ab5e