these 7 derivations will be built:
  /nix/store/0027c7wfr5mszjdcd82zmxlxk6hwdkpn-unit-postgresql-setup.service.drv
  /nix/store/ad0kykm2fbm7bpq20zka50imb1w10h3g-system-units.drv
  /nix/store/7ijq4wndzifjpqrn5ar7yz68pnqnk4wb-etc.drv
  /nix/store/080wkqsk9dkmzd08zxaxndzxa2d1ckdx-nixos-system-server-test.drv
  /nix/store/rn4gfhxlhifgw2b1x1wvw2jj1maxzdgr-nixos-system-server-test.drv
  /nix/store/835hqhhv5pwbf16njlac4mxziq5vw77s-nixos-test-driver-pgtap.drv
  /nix/store/wb2rmiw0jjdvjy7ykwkyl94lqvl4bxv9-vm-test-run-pgtap.drv
these 9 paths will be fetched (79.4 KiB download, 499.2 KiB unpacked):
  /nix/store/fm5azsw07b349p9v9iq5frmdfqb0a6b6-activate
  /nix/store/yg51l1x1dmkv3qq20fwijb638fad6jrg-closure-info
  /nix/store/x9slh7k3swnga18h6jnlig0g63dv792c-etc
  /nix/store/px5l0ksm8b7adypxxr2vkq9nsa4v4xgi-nixos-system-server-test
  /nix/store/zc58kh2y862nw1680c44hwymyx280h69-nixos-system-server-test
  /nix/store/by74amsa38pvflxx6zgskxip12n0vwkv-nixos-vm
  /nix/store/bidpcyshp425sfnp0gy223d3v18bz7hz-run-nixos-vm
  /nix/store/bgswh01px7lxf4dpfidgjig8d9dam528-system-units
  /nix/store/s3vf2ph2gzpcknb313mxvkllsirhg2c6-unit-postgresql-setup.service