fix nix build "libxkbcommon-x11.so could not be loaded."

[leana8959]

Currently running wired would cause this error:

A wired socket exists; taking ownership.
Notification bus name acquired.

thread 'main' panicked at /build/cargo-vendor-dir/xkbcommon-dl-0.4.2/src/x11.rs:59:28:
Library libxkbcommon-x11.so could not be loaded.
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

This PR fixes it.

Note: I don't understand why this issue is only showing up right now. Maybe the binary was able to find the .so somewhere else, and that path is no longer available.

[Toqozz]

Awesome, thank you. I'm not sure why that would have started happening which seems suspicious, but that dependency makes sense.