The .link file is used as a lock, so I think we should put the
"submodule" attribute in there since turning on submodules creates a new
.link file path.
Nix is a new take on package management that is fairly unique. Because of its
purity aspects, a lot of issues found in traditional package managers don't
appear with Nix.
To find out more about the tool, usage and installation instructions, please
read the manual, which is available on the Nix website at
https://nixos.org/nix/manual.
Contributing
Take a look at the Hacking Section
of the manual. It helps you to get started with building Nix from source.