fractal: fix build due to git dependencies in Cargo.lock

[Philipp-M]

Description of changes

Due to 4329de1
fractal failed to build, this PR should fix the issue.

@L911P, @LostAttractor, @NickCao, can you test if this fixes the issue (I'm not sure how to get rid of cached dependencies, as it still compiled for me without this, I guess I would need to do a garbage collect or something)?

Btw. I have first used something like this to avoid putting to much bloat (Cargo.lock) into nixpkgs:

rec {
# src = ...;
  cargoDeps = rustPlatform.importCargoLock {
    lockFile = "${src}/Cargo.lock";
    # ...
  };
# ...
}

but due to to --no-allow-import-from-derivation in nixpkgs-review it fails, as eval depends on a derivation that has to be build. Is there a better way to do this instead of including the Cargo.lock directly, without having to depend on a build (e.g. builtins.fetchers)?

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.05 Release Notes (or backporting 22.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[NickCao]

It's ok to include the Cargo.lock in nixpkgs (and we have no better choice yet, check #217084 for context).

[NickCao]

Tested building locally, waiting for ofborg to double check. And another concern: does the updateScript still work?

Edit: nix-update seems to have support for this.