this derivation will be built:
  /nix/store/1xlg533hrh11192bdqh13ar1x88acpvq-vm-test-run-postgis.drv
this path will be fetched (4.0 KiB download, 16.6 KiB unpacked):
  /nix/store/c461sw5aylih8rsnmi0bcyc5ircy9qs4-nixos-test-driver-postgis