this derivation will be built:
  /nix/store/x31li9yhyn1s476f9k10cbrn0scl67xj-vm-test-run-postgis.drv
this path will be fetched (3.7 KiB download, 15.0 KiB unpacked):
  /nix/store/i1pqh6z45ip8c6a4yab4hvlrd1flnfa3-nixos-test-driver-postgis