Version 0.7.1 is not usable due to missing lib/gitlab/experiment/rollout/concerns

I'm the package maintainer for Gitlab on FreeBSD. I currently prepare the upgrade to Gitlab 14.10.0.

But if I try to make gitlab-experiment 0.7.1 available I get the error message:

===>  Building for rubygem-gitlab-experiment-0.7.1
ERROR:  While executing gem ... (Errno::ENOENT)
    No such file or directory @ rb_file_s_lstat - lib/gitlab/experiment/rollout/concerns
===> Compilation failed unexpectedly.

It seems that the gem generated is refering to this directory, but it does not exist in the gem itself.

Thanks for any help.