these 2 derivations will be built:
  /nix/store/3kjvlblw0f3i5ms7c46nxsfb74nzc1sr-nixos-test-driver-wal2json.drv
  /nix/store/snkcfmznz5gwf77w41w8a8ns98s1i75f-vm-test-run-wal2json.drv