Gitlab is not build for aarch64 on Hydra, while gitlab-runner is.

[tobiasBora]

Issue description

On hydra, it seems that gitlab is not built on the architecture aarch64, as you can see here. (Fun fact: gitlab-runner is actually built on Hydra for aarch6.).

Technical details

Please run nix-shell -p nix-info --run "nix-info -m" and paste the
results.

• system: "aarch64-linux"
• host os: Linux 4.18.6, NixOS, 19.03pre151837.ca2ba44cab4 (Koi)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.1
• channels(root): "nixos-19.03pre152634.218ce4de508"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos