Impure cabinet modules derivation

[Sanae6]

The actual output hash of the rcade-bun-modules.tar.gz derivation changes on every build attempt, making it impossible to build the cabinet package.

[Sanae6]

@fcjr is the move back to bun still ongoing? i had a minor nix pr for the vm that i wanted to push, but haven't been able to test it in the main branch's current state.

[fcjr]

Hey @Sanae6 finally gave up and moved back to pnpm, this should be fixed, but please re-open this if not!