these 20 derivations will be built:
  /nix/store/drc1la0n39r3w73q8vqd1az3zh7pzywq-unit-postgresql.service.drv
  /nix/store/ipmmigb5r219k2cqb9dq7m92na5dvk4i-system-units.drv
  /nix/store/0dlvrpblanvg5iysifkd35l4v9bpynl8-etc.drv
  /nix/store/5m8kdr8zbwgnwwi0sd8gvi2mgrxhdgml-activate.drv
  /nix/store/0pdc1vjk4zydxwdicpwkvyywkxrlzqxi-nixos-system-server-test.drv
  /nix/store/gz5p7n4ixq6mfk8d6kxnw1x9yh7km910-unit-postgresql.service.drv
  /nix/store/62jisxxsdzbdk9i35kacmiqrh8wp2f3d-system-units.drv
  /nix/store/r4kqhpl8nvs2dj3sw5vy450z85kc471g-unit-postgresql.service.drv
  /nix/store/wyjajfqxzl23jm4c4g8gczj1s8dhpnpx-system-units.drv
  /nix/store/c380sd54jaixhn3xmnr6skaal8cp1hvy-etc.drv
  /nix/store/77y7k3q3irk4drl4mhv3b4kwzr555d2q-activate.drv
  /nix/store/kdfnisjz9rxx5vrv8pbq7mvdl95drp0v-etc.drv
  /nix/store/gglyxy2a6lrbmck6y867z8rbknv1ms78-activate.drv
  /nix/store/is71m4w0y1khrncac9ifpmg06px450r1-nixos-system-server-test.drv
  /nix/store/gg7n58f94nhk1j99f2y3az09093wsxnv-nixos-system-server-test.drv
  /nix/store/7qx597959b1b5ipgkgp0jwijnwxsf3k3-closure-info.drv
  /nix/store/wc3vrlyqf9wsm5snr9p5nhhmdjq7mj2b-run-nixos-vm.drv
  /nix/store/89jw97wvmslmssn3ywqjy2w4a79cx63x-nixos-vm.drv
  /nix/store/jn7kzwvdbbsqay6dzz1b29a9qw54xgpz-nixos-test-driver-http.drv
  /nix/store/rkbaya1dphv62qy5nhc7fan9j12nif11-vm-test-run-http.drv