these 20 derivations will be built:
  /nix/store/9al0r289pmn1l1xp5s4clawdzbwrpgas-unit-postgresql.service.drv
  /nix/store/94pccpgc4hd95xdzn5x9y247n3g7bcv6-system-units.drv
  /nix/store/kpfrfivv1myplpyp9w48yzi3pkg5x7m2-etc.drv
  /nix/store/0hi9xf47sl98sx29vai8yjnqy5417pdl-activate.drv
  /nix/store/74vai46ywl0rc14j24zmplnqwylb12f4-unit-postgresql.service.drv
  /nix/store/3yz1jvllyyn8ssqbsl2d4y9vz0j5xqhf-system-units.drv
  /nix/store/5wgwg7pdkg1fkq5x8kqxf37dd4y9jps9-etc.drv
  /nix/store/glb3q6c0c62l8lqvshcd0gwfmadqazs9-activate.drv
  /nix/store/awbc8fnkmj78ixys11rg4hhqq1m8jhzs-nixos-system-server-test.drv
  /nix/store/gk7472fvnbngix5azzk5mawz8ahvmhcm-unit-postgresql.service.drv
  /nix/store/wbwks825s668hmxzflf1ss0a7rfrkswd-system-units.drv
  /nix/store/c2nriwrdqbr3kf4n85b6nxhdjby9zkf9-etc.drv
  /nix/store/gdi8mz1czpnswihrv0wl9x4y0d5vv9xy-activate.drv
  /nix/store/sbh9p7qrp6si8x817rawqchj7v60fq6w-nixos-system-server-test.drv
  /nix/store/i8jv68svwf0z8r3vrdcl805406ppjdx7-nixos-system-server-test.drv
  /nix/store/rd2zj1s1mk25rx9mzi9lvxrlmpl8k0qb-closure-info.drv
  /nix/store/w5a7k808vxcyp9ygv4jgqk1msba7sw52-run-nixos-vm.drv
  /nix/store/p3w55zcfihpy1hkga55g76s30h2zx49l-nixos-vm.drv
  /nix/store/i6jnfd0xl3qdjr45p7b5i2fjxcbq8srz-nixos-test-driver-pgroonga.drv
  /nix/store/676vx8mcswi6mi6qxbib6ykj3qnk3sca-vm-test-run-pgroonga.drv