[Feature]: Nix Flakes GitLab support

[pinage404]

Is your feature request related to a problem you're trying to solve? Please describe. I would like to install package hosted on GitLab with Nix Flakes

DevBox seems to support it

set -o xtrace
alias devbox='nix run nixpkgs#devbox'

cd $(mktemp --directory)
echo '{"shell":{"scripts":{"check":"git-gamble --version"}}}' >devbox.json
devbox add gitlab:pinage404/git-gamble
devbox run check

But the documentation doesn't mention it

Describe the solution you'd like Update the documentation to explicitly explain this is supported

Describe alternatives you've considered I use it even if it is not officially supported

[artemklevtsov]

DevBox seems to support it but I got the following message:

$ devbox add gitlab:pinage404/git-gamble
# Error: Package gitlab:pinage404/git-gamble not found
$ devbox version
# 0.10.7

[arunvelsriram]

Hi. Is gitlab supported? Am trying usage flake from a private gitlab repo?