Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
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).