these 2 derivations will be built:
  /nix/store/sl85bi0hn17lb6ky06lrng8c9p5a2dxp-nixos-test-driver-pgrouting.drv
  /nix/store/6klq03h41cw19vl6fcyyijf8jj09zqh6-vm-test-run-pgrouting.drv