zsh:1: command not found: yabai

I've got `yabai` and `skhd` installed via `brew` and I've got `zsh` configured by nix w/ home-manager.
I'm running the service via `skhd --(start|restart|stop)-service`.

The plist includes the homebrew prefix (`/opt/homebrew/bin:/opt/homebrew/sbin:`) in the PATH environment variable and `echo $PATH` from the shell returns `/opt/homebrew/bin:/opt/homebrew/sbin:..` as expected.

Debugging skhd using: `alt - p : echo $PATH`, the `/tmp/skhd_*.out.log` **does NOT include the homebrew prefix on the path**. I don't understand why. It's in the plist for the service and it's also in my shell. What could I be missing that would mean it's not on the PATH of the service's `zsh` call?

Start by reproducing the service launch with the plist and `skhd --start-service`, then compare the PATH from `alt - p : echo $PATH` with the shell environment. Inspect `/tmp/skhd_*.out.log` and the plist environment; done means the service's zsh invocation includes `/opt/homebrew/bin` and can resolve `yabai`.

Written by the indexing model from the issue text.