[gitlab-ci] add git to nix-shell

1 job for 294-dev-test in 54 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #1599
test

00:00:54

 
Name Stage Failure
failed
test Test

[ FAILURE ] Check if 'stack' command is available
Error: Command failed with exit code 2 (ENOENT): stack --allow-different-user --numeric-version
spawn stack ENOENT
at Process.ChildProcess._handle.onexit (internal/child_process.js:269:19)
at onErrorNT (internal/child_process.js:465:16)
at processTicksAndRejections (internal/process/task_queues.js:80:21)
Cleaning up file based variables
ERROR: Job failed: exit code 1