these 2 derivations will be built:
  /nix/store/k5f3c90x5ikk3sgk383c4n75bn8kjpas-nixos-test-driver-pgrouting.drv
  /nix/store/50kqx8r1zyhcjarmbxxag0r30bm3gg76-vm-test-run-pgrouting.drv