Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [Running transaction test
Error: Transaction test error:
  file /usr/lib/rpm/fileattrs/sysusers.attr from install of systemd-rpm-macros-253.14-1.fc38.noarch conflicts with file from package rpm-build-4.18.91-3.fc38.x86_64]: [DNF executed by Mock is trying to check whether the package build dependencies are installable.  It appears that `rpm-build` and `systemd-rpm-macros` conflict with each other on `sysusers.attr` file (both packages provide the same package but with different content).]
=============
[
 rpm-build                   x86_64 4.18.91-3.fc38              copr_base  69]: [Note that `rpm-build` is installed from `copr_base` directory, not from Fedora default repositories.  It means that the `rp-build` package is "overwritten" by the Copr repository, and is non-default.  The fact that the Copr author overwrites this low-level utility looks suspicious and is likely guilty for the transaction failure.]

Issue: Likely because the repository provides broken `rpm-build` package, and thus Mock failed to install all the needed dependencies.
Resolution: Fix `rpm-build` package or `systemd-rpm-macros`, but likely the former.