these 19 derivations will be built:
  /nix/store/09rcla5hfqmhhnc2g0y6vm8gjrpwac2z-unit-postgresql.service.drv
  /nix/store/frgfmzwqgax631zxd5mq9jyb8pfxqimr-system-units.drv
  /nix/store/divcr0y55c2i7fyljmdi9qwcsg5npdji-etc.drv
  /nix/store/c8jy7nsqcwyvhrjxnlziq7qyja81sd2x-activate.drv
  /nix/store/zf99g07lgc76ngrrp5c5x0pilsrzlmkp-unit-postgresql.service.drv
  /nix/store/wjdiy1p65cb48rvavk25sp57hysbcrii-system-units.drv
  /nix/store/rrlim3r8i88hbz3rm3i3kqgklxz06d1i-etc.drv
  /nix/store/z936y944avgmbvyyv4qpclzjiiknbc8d-activate.drv
  /nix/store/lkqw4imrcr6nr9h250ah2p5g8x5vblk4-nixos-system-server-test.drv
  /nix/store/5xjnlncrj3pmw7n684nxin606fk8xvjj-unit-postgresql.service.drv
  /nix/store/7zbvam6ga4vmlxqx5zvg9sr2cmmzj6wi-system-units.drv
  /nix/store/qc3smbri3x4gvp1w83y39726w48r3vwx-etc.drv
  /nix/store/r9nmd99i2shq82a5j3c4zl7mwcpw1q9a-nixos-system-server-test.drv
  /nix/store/cxjl591vidg5ww2aj6l58af7f76zyak7-nixos-system-server-test.drv
  /nix/store/7zyj8jzwndbmja743a5aqjdaiw9d4swk-closure-info.drv
  /nix/store/3rcpyfgm2zlvrm89mi8a4g8fa1wpvnsv-run-nixos-vm.drv
  /nix/store/b7cp22wm787i4l7bd5zmdk31jvm5bww5-nixos-vm.drv
  /nix/store/fym36f7qlxmlsj7dnrad2kc4zn2k3k9f-nixos-test-driver-pgroonga.drv
  /nix/store/d5m3n6ip2mr2vyp10xxd2f8xl54mryqg-vm-test-run-pgroonga.drv
these 4 paths will be fetched (13.9 KiB download, 135.5 KiB unpacked):
  /nix/store/c726hqzb3b5wsbzc5a4sza2bskqywb2a-activate
  /nix/store/6147bvlclj1g88mn2j0ldgwx9hvrsxx1-etc
  /nix/store/0fynxck8vxx228f20pkjhsg7kxyi2izh-system-units
  /nix/store/s36xdl1qhgnk3b9c9alna3bcd5z2c57x-unit-postgresql.service