these 7 derivations will be built:
  /nix/store/v4c0mzq4mhakb1n6wz5jcc92j65ikbpn-unit-postgresql-setup.service.drv
  /nix/store/cvzkfbpa2d16yvcd7gk49kj7wj9n0dny-system-units.drv
  /nix/store/q2vx1z7lh8s0ywv85sn4lpl74v0d42gc-etc.drv
  /nix/store/7q2fbcmfswhn4pcdnyq2gh1s7yjdd9js-nixos-system-server-test.drv
  /nix/store/w7msllarddqk4zpyqdi5gz2h4y16rqk0-nixos-system-server-test.drv
  /nix/store/bbwh8nw07ksvlshxpsicrm6l6vmab07s-nixos-test-driver-pg_jsonschema.drv
  /nix/store/5jcky4xbmc8vp3ajiiy4hxdasbf5rplc-vm-test-run-pg_jsonschema.drv
these 9 paths will be fetched (79.4 KiB download, 499.3 KiB unpacked):
  /nix/store/3mssrwkvin1aw8f1ksrid638rcd0glnl-activate
  /nix/store/aknhg6fqgqigjclwlc3qpvy5hp5jjp83-closure-info
  /nix/store/z7mr2z7444m9bxxrf779bpaiphlp4kzl-etc
  /nix/store/aj1k1rl23kkl8bqiq4q95qxvdrp928pa-nixos-system-server-test
  /nix/store/r6iqs454dbqhmkbknab1qv5cl0hzynj7-nixos-system-server-test
  /nix/store/ml6i04bg5hbyspizz8x0gsa5kf9d2pmx-nixos-vm
  /nix/store/3qi6m04layvg3plhjlj4ki126klcfbvw-run-nixos-vm
  /nix/store/6bnwag4cmb8zm0ww13v7m1ai4bjinln9-system-units
  /nix/store/hix09w8gaxibrff1szllis9xnj0sa7ni-unit-postgresql-setup.service