I "recommend" you work on making the install process better then. There are projects bigger and more complex than gitlab that don't have any trouble with installing from source.
It also has contributor benefits: if I can't build the repo into a working state, I can't contribute fixes. That's jammed me up with GitLab at least 3 different times now where I've opened issues that I'm perfectly capable of fixing, but since I'm not a battle-hardened Rubyist, and gdk is both some whatthehell and also dies mysteriously, those issues just lie on the pile with the other 46,000