these 20 derivations will be built:
  /nix/store/18797qjr8jm149wcgsb09m469da1fblr-unit-postgresql.service.drv
  /nix/store/xd6jjxxfabzlfvz5fckn70qj4xd1w448-system-units.drv
  /nix/store/l44rnxiwj3blmvl7174ka934m6r2dml4-etc.drv
  /nix/store/2pdy10dsdni74d0bmj5yvks3d8bxdvsw-activate.drv
  /nix/store/b13pcd2hmk9cpw1qa85daszb1q4n2gmz-unit-postgresql.service.drv
  /nix/store/cpwgb3dgjdkwgchf3p39nb00brg86596-system-units.drv
  /nix/store/3ma497nrb5qi6z3xwxs53w2v4rmkscq3-etc.drv
  /nix/store/av2zrxf8xp59qify7qz32rrhxx0vpf8g-unit-postgresql.service.drv
  /nix/store/rwxwfm9r84af8cpd2crajmany5yiwb9j-system-units.drv
  /nix/store/hi3p4g5x2qwr2hjslnzhb2samw96xrgi-etc.drv
  /nix/store/w87ix1sbf4wd1zm75xx1623f4a9vwy4x-activate.drv
  /nix/store/fa6pg4sk5rphm8qbg1b15g82r6jjjf6h-nixos-system-server-test.drv
  /nix/store/x0abb3kqgjyyaliw7q7nqf8fhpdbblsg-activate.drv
  /nix/store/rb7hvxyflp5jrblrq1ar921a78lk4w2s-nixos-system-server-test.drv
  /nix/store/dp566fddw9p2q78b8qxv58hlcimwamhl-nixos-system-server-test.drv
  /nix/store/qhri5ivn682m4hsrxzg7bphrm4v00k2v-closure-info.drv
  /nix/store/b3ihq2063rc4wnwvwwjdxww7gmnrbw7a-run-nixos-vm.drv
  /nix/store/fshfi0640dnliix3ldjy59lna91ak7w7-nixos-vm.drv
  /nix/store/pk5b1fnk09x6gk79iyg0mg98x95vh7lm-nixos-test-driver-http.drv
  /nix/store/favw94n7f33r0fzpxby8h4xzjk2kimwq-vm-test-run-http.drv