this appears to fix the following issue for some reason

```
nix-repl> (import ./. { localSystem.system = "x86_64-linux"; crossSystem.system = "x86_64-linux"; }).bash
«derivation /nix/store/5lz9p8xhf89kb1c1kk6jxrzskaiygnlh-bash-5.2-p15.drv»

nix-repl> (import ./. { localSystem.system = "x86_64-linux"; crossSystem = "x86_64-linux"; }).bash
«derivation /nix/store/1whiq03rsfrmch2ds3jhyqjaczfz97lb-bash-5.2-p15-x86_64-unknown-linux-gnu.drv»
```

fixed
```
nix-repl> (import ./. { localSystem.system = "x86_64-linux"; crossSystem = "x86_64-linux"; }).bash
«derivation /nix/store/5lz9p8xhf89kb1c1kk6jxrzskaiygnlh-bash-5.2-p15.drv»
```

This is a workaround that lets us use `==` on systems despite the
functions that would make `==` always return `false` if a
workaround like this is not applied.

The real solution is to either use `lib.systems.equals` for all
such comparisons, or to remove all functions from the elaborated
systems.