Hello! Thank you for your contribution!

LGTM except for a few minor nits:

• commit message should be something like:
  Packaging: Ensure sbindir is properly set on newer Fedora (42+)

• probably squash into one commit?

• shall we use a %{__sed} macro instead of a direct invocation? I'm not really following the contemporary stance on using macros vs directly calling executables in the specs, but at least it would be inline with pretty much all the other calls in the spec file.

shall we use a %{__sed}

No.

Notice: this is only the mandatory change required to build F42 package

BTW current spec file is outdated

Especially for

• systemd
• sysusers

Switch to systemd packaging work for all Fedora and EL >= 8
Switch to sysusers packaging work for all Fedora and EL >= 8, and is mandatory for F42

Ex recent change done for my repo
https://git.remirepo.net/cgit/rpms/unit.git/commit/?id=22a5372cf24b0d2e26aa74948b2e797ac880dfc3

@thresheek

Unless you have any objections, I'm going to go ahead and merge this...

Yeah I think it's fine.