these 20 derivations will be built:
  /nix/store/bf9c9pqfs0wmbw4022xviw78fyxm7km2-unit-postgresql.service.drv
  /nix/store/zmj64mxfwnh1cnw9ndiycwwf2cv4s0g5-system-units.drv
  /nix/store/inzmxa24yjrcj4chngvkkmkj9mhmqfqs-etc.drv
  /nix/store/6pi4h05yawi32prifxqb8v74wzjdzc0a-activate.drv
  /nix/store/yx7lmw1gavjmjmaiwrbplwm6xr61x1p7-unit-postgresql.service.drv
  /nix/store/rnchj4ag95qvkas7n9z4h7l4r2mymd5k-system-units.drv
  /nix/store/665hka0510vy82sikifc2qzpmhx75jbd-etc.drv
  /nix/store/qy1z8f43g0w43d9vmibgz5qbrvl4qgzx-activate.drv
  /nix/store/7ybi0n5662dmzvs5nh8b3cyw15xvdwmi-nixos-system-server-test.drv
  /nix/store/3sl04gr1lzavgh6nbdq6cr0hfnjxr76z-unit-postgresql.service.drv
  /nix/store/w3bqfgfm2bgj36crrpzjchxg21fnzq6z-system-units.drv
  /nix/store/30p256sp1bggfwbk12yfabwjgj590aa2-etc.drv
  /nix/store/61fn7zvsggvm834fsihbcsla6mmj2ayb-activate.drv
  /nix/store/aaydasdby4021w57agn4wn5s8wc5b23s-nixos-system-server-test.drv
  /nix/store/chyz302d5qa4pnmxw2mjl4kkqramgd55-nixos-system-server-test.drv
  /nix/store/17fcx2ak6r74xyg0w8k15ggxqy454k7p-closure-info.drv
  /nix/store/wyhm7rr5ks1fm9n0mrykwjr4mp06d4wy-run-nixos-vm.drv
  /nix/store/09nvg45x6lrziksrmkr6xxh3ld2ivzvj-nixos-vm.drv
  /nix/store/hh5r9r8agd611lr6j5lqycpdvwi8algj-nixos-test-driver-pgroonga.drv
  /nix/store/ymys70j67m92zy04lh46awxpckcd5gyr-vm-test-run-pgroonga.drv