these 20 derivations will be built:
  /nix/store/hlgp3bs3fwfxfxkkcq13yj7bna1f93a3-unit-postgresql.service.drv
  /nix/store/5y7fi1c19kyr1myn5igy9nrqxqdschr4-system-units.drv
  /nix/store/7b5wyzhnzxxr0lzr2qhiljg5j90q4l91-unit-postgresql.service.drv
  /nix/store/f09ppm955jiwazcipp20q2ijq0xhf5zm-system-units.drv
  /nix/store/67zcfl8wh6rcf7l8rbh04al4ncng3314-etc.drv
  /nix/store/6czvmcksk5k81jfld0r9hhnkbxll8910-unit-postgresql.service.drv
  /nix/store/b51p432h7x0ihnpvhfi432nlimd3k6dq-etc.drv
  /nix/store/lympcrk8s60l4rghdl7ysm1ypazx95a4-activate.drv
  /nix/store/sr5if0v75ghrnzk0q1pzdri9viy2ld17-nixos-system-server-test.drv
  /nix/store/ljhx3idzkw6y5ica024i8dq1a7hffz6v-system-units.drv
  /nix/store/iw2p16b7chknq63qcb9333fp3hyhlxis-etc.drv
  /nix/store/c8kgyan05q2d4sjspmxjpx1v89r58x6a-activate.drv
  /nix/store/xr9gaphnqvgmn5m7bsxbn1w30575zl44-nixos-system-server-test.drv
  /nix/store/z8z3dm8v7bkskfbadvb60whkvxqa76qr-activate.drv
  /nix/store/w50lp40x9h8jnwy08gh1ajxd2mkfz80g-nixos-system-server-test.drv
  /nix/store/f1j89dqviw6n53kpkcww3jrrab3qhy4g-closure-info.drv
  /nix/store/f52n07nhh38657kflx7h025c06611l76-run-nixos-vm.drv
  /nix/store/7f8m41szhnxd9cg5xrq2nixd3a2b83pj-nixos-vm.drv
  /nix/store/rjg4dn4s8zvmyarif34miszrvnsm5ijx-nixos-test-driver-pgroonga.drv
  /nix/store/wdqp9vrgnli6fzb6c6n11gkjns1hv8yf-vm-test-run-pgroonga.drv