these 8 derivations will be built:
  /nix/store/19micvzmqqw8wam7p6csr1m1h9vq7944-nixos-system-server-test.drv
  /nix/store/q6w1cry2kdcflq90b2565qznh6kk0lfp-nixos-system-server-test.drv
  /nix/store/rg9gj90bwf4aafn9v4354nd5dfbw3l5w-nixos-system-server-test.drv
  /nix/store/1mliv523xf9ccc31hyb7prbh8x70v7n0-closure-info.drv
  /nix/store/x25mch8gmw0niwwfppwdmbs1897s3hww-run-nixos-vm.drv
  /nix/store/ffszf4kfbbf8x60sv4a9amynzfhayhnx-nixos-vm.drv
  /nix/store/nbsyr3f2naa785jf0rk42hp74vib4hmn-nixos-test-driver-pgrouting.drv
  /nix/store/5b7fmq55a0a6zyfy94g1z98sawqgqfwd-vm-test-run-pgrouting.drv