[nix] fixes for .gitlab-ci.yml

2 jobs for dev-spago-next in 0 seconds (queued for 109 minutes and 58 seconds)
Status Job ID Name Coverage
  Test
failed #12566
deps

failed #12567
test

 
Name Stage Failure
failed
deps Test There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job trace
failed
test Test There has been a timeout failure or the job got stuck. Check your timeout limits or try again
No job trace