gitlab-ci: Initial commit

1 job for update-nixpkgs in 25 seconds (queued for 6 seconds)
Name Stage Failure
build Test
Checking out b28146e0 as update-nixpkgs...

Skipping Git submodules setup
Executing "step_script" stage of the job script
Using docker image sha256:e2f06f685d895a036edb6391ca014fb7a1d1e6801d95a8d51cdd7af519504eb4 for nixos/nix with digest nixos/nix@sha256:d66c307749b460c054d8edf6191f58ec38c569c8639161d41eb6e4879baf7ff2 ...
$ nix build
error: experimental Nix feature 'nix-command' is disabled; use '--extra-experimental-features nix-command' to override
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1