these 20 derivations will be built:
  /nix/store/201m1zk4br2d5mdjd6fjlxdgnbcs1i2z-unit-postgresql.service.drv
  /nix/store/1ic98i9bz1039acv5wl9sba4nym9h1rj-system-units.drv
  /nix/store/wxhlm2lppgmspj5hggdl5x2nc3gbm6vi-unit-postgresql.service.drv
  /nix/store/p2c5gsfwxwdyny4l5hcmvpg9dbjrq90z-system-units.drv
  /nix/store/plzfmp627635v5ini3kappaddq5fzn19-etc.drv
  /nix/store/48ak1q6bvappavcs0sx4paajzc1fv424-activate.drv
  /nix/store/b98yynnbni1mzxjs7x0gyz722jvcv9jp-unit-postgresql.service.drv
  /nix/store/b8ydigz8yk6p0i884b8apiwfzll0fjah-system-units.drv
  /nix/store/a8f75fld0ifqq9w5rph9mdn5wxixbbx7-etc.drv
  /nix/store/ibsv3r9aavm6pixb4a9q7x6lv48a2q4q-activate.drv
  /nix/store/c2y43d2acw6jw21mb7h99hf89ss2n0hr-nixos-system-server-test.drv
  /nix/store/5msr4jwgi1qapwf1qaggdkdhd1w02392-etc.drv
  /nix/store/w7xq2icv4pdq2jka44nz7k8qn7r74knq-activate.drv
  /nix/store/rqq0dg3g7hq8iwsd83fvg3ky5s1d4s71-nixos-system-server-test.drv
  /nix/store/4sn6imw103c6sws6sb9chvabx6j71vhf-nixos-system-server-test.drv
  /nix/store/grq1h1zxzk7lv679igg1z34s8wxk68i6-closure-info.drv
  /nix/store/v8c6ijaxl6hgywnk5dcdqdznzxxzcmf6-run-nixos-vm.drv
  /nix/store/7qqxhf8g8sz6cblm5avbra6ygw30ghv5-nixos-vm.drv
  /nix/store/j47yr127vxfgldp6s3jvlxnnk7sy9h3j-nixos-test-driver-pgroonga.drv
  /nix/store/yi9jll0p8mb6kjs0yl0mdaykqn6lxfjb-vm-test-run-pgroonga.drv