Allow specifying ?submodules=1 for the current flake inside the flake.nix, and maybe make it the default? #9842
Description
Is your feature request related to a problem? Please describe.
I can run nix build .?submodules=1 but not declare that inside the flake.nix
Describe the solution you'd like
A top-level attribute submodules = true; inside the flake.
Describe alternatives you've considered
Stop using submodules.
Additional context
Maybe this should be the default?
Priorities
👍