these 20 derivations will be built:
  /nix/store/2a81sg1j1wb0f5zdy0b0ia33v3raf532-unit-postgresql.service.drv
  /nix/store/zwd5bb4d8lk26rhw67ik6nwkfhb9y4d4-system-units.drv
  /nix/store/s8mdzza5gq9axis9wmnwnlfs86c3gi7i-etc.drv
  /nix/store/248mgs52ih7ar0gd7vpsm1si0ra3mskb-activate.drv
  /nix/store/sw9l3f4j6ql7q8bq04lccv8gwbm8jdnf-unit-postgresql.service.drv
  /nix/store/c0pk57x4a0py11swnfpaa5f2jyj05vg4-system-units.drv
  /nix/store/zy7a4nlydgszrvyf4kchnw3rp2z1p3pp-etc.drv
  /nix/store/ba3dk16bxhz65xa64ljvp9npjdvl9vxq-activate.drv
  /nix/store/kp4sdqajfgj0fqmnihgz4z8y76hak747-nixos-system-server-test.drv
  /nix/store/db3v83xygmf1z7yiq6lf48k128zcjdg3-unit-postgresql.service.drv
  /nix/store/kzs977f2fwyik1yarsqb8djx9dgnx2n3-system-units.drv
  /nix/store/yr3720lridyiywi1aqr6wd1aabgwvvwh-etc.drv
  /nix/store/wr5fyzmf1ggz6d4fg13m1j9rk7jmbn1q-activate.drv
  /nix/store/yvfa0rj4b81gzvznprxyazc9fr8v7kng-nixos-system-server-test.drv
  /nix/store/mz2c4hq7iyw414d44krg8lnki35n9713-nixos-system-server-test.drv
  /nix/store/safws2g6l9pdjnkljvy5pnbj226g7qkc-closure-info.drv
  /nix/store/d80x56kx4ir0alk9wa5cwangavfrf01p-run-nixos-vm.drv
  /nix/store/ixpkav7h0zxjqi3249bi9sf0h3i6b7sq-nixos-vm.drv
  /nix/store/cshpfqq39i04ba826rh8laz4qyjjqzzq-nixos-test-driver-pgroonga.drv
  /nix/store/dhhpgi50jhbbg21mfy1afb4mqnxdgf2z-vm-test-run-pgroonga.drv