these 2 derivations will be built:
  /nix/store/qn2s5vdg8cn68lgiinbs5yv2nmhnj70c-nixos-test-driver-pg_hashids.drv
  /nix/store/fb15hkm1q6rgbv9pjxd6ahz8mp3sc2xn-vm-test-run-pg_hashids.drv