Whovian's Aaru nix flake

I wanted to make a nix flake for Aaru to use it in my NixOS environment, and also gave me an oppourtunity to play with flakes on a "simpler" project. This is my first flake, so please let me know if you see ways that I can improve. You should be able to build it by running nix build github:Whovian9369/aaru-nix-flake#prerelease.

Aaru is licensed under the GNU General Public License, Version 3.

Warning about Aaru v6.0.0 Alpha 9 from the developer on its official pre-release page.

WARNING THIS IS A PRE-RELEASE

Images created with this version are not guaranteed to work, be repairable, or contain correct information.

Notes:

• I have not been able to test this on a system that isn't x86_64-linux, so I have it hardcoded in the flake.
• The version number that you see when running aaru --version will just show 6.0.0-alpha9, when it normally shows 6.0.0-alpha9-XXXXXXXX where XXXXXXXX is a short git commit hash. For this derivation since we don't keep the .git directory, I disabled the commit hash portiion of the version number by suggestion of the main developer.
  • You can see which commit this flake was made with in package.nix anyway, so it's not an issue that I'm personally as worried about.