these 2 derivations will be built:
  /nix/store/vqb5cq6xfg69ck5795xr9cpahbl68khy-nixos-test-driver-pgrouting.drv
  /nix/store/jmfknnbjxk511f1zhawflwnj8wd64bfi-vm-test-run-pgrouting.drv