Cannot start Gitlab-Gitaly

I am trying to package the newest version of gitlab-gitaly officially for Arch Linux. However, we are encountering the following bug when executing the Gitaly services and already spent multiple hours into figuring out why this happens or what this means. We have no trace on how to fix this and would be very happy and thankful if you could give us a hint on why this happens.

From what we understand Gitaly tries to execute Ruby 2.4.0 instead of 2.3.0 while we patched the sources to use bundle-2.3 instead of bundle.

We patched files internal/rubyserver/rubyserver.go and internal/linguist/linguist.go to use "bundle-2.3" instead of "bundle" in three places (bundle-2.3 pointing to the 2.3.0 distribution on Arch Linux) as well as the Makefile.

Any help with this would be greatly appreciated. You can find the PKGBUILD file here.

The package would likely be abandoned and no longer available on Arch Linux if we can not resolve this issue.