these 6 derivations will be built:
  /nix/store/kgpmdxs1zb1y3may6941h4dsr5yqrnda-nixos-system-server-test.drv
  /nix/store/z60kh7ppvnmab3iy4nhm0w8rd0i48g29-closure-info.drv
  /nix/store/v8s46svi3bhshxl8i48h6mslvxrfrw5l-run-nixos-vm.drv
  /nix/store/y4rf47wp9ymc5mlj5v4xp619666fn679-nixos-vm.drv
  /nix/store/02rys1di7mvcgch3lvcn0fkqj5rr0kf1-nixos-test-driver-pg_tle.drv
  /nix/store/hwj3zwws9fnzg836v5ck00ny412gyysp-vm-test-run-pg_tle.drv