these 2 derivations will be built:
  /nix/store/vzdiak445r9klfkmpiv355ysw2q739y7-nixos-test-driver-pg_partman.drv
  /nix/store/lrm1vkxqfwg9kd722czjilpsms85kw8s-vm-test-run-pg_partman.drv