these 2 derivations will be built:
  /nix/store/975zs76qw4kifwxpw8zsgz31m9r6qhf4-nixos-test-driver-pg_partman.drv
  /nix/store/pz43s377sryk3rdakyiwlz0fh2z9vl20-vm-test-run-pg_partman.drv