[alvil]

https://github.com/jarun/nnn/blob/master/nlay

  # bash 4.0 way to switch to lowercase
  ext="${ext,,}"

[apjana]

Ahh OK! nlay is not an essential part of nnn anymore. It's only invoked if you use the locker or invoke desktop search utility. We retained those two to keep the utilities customizable. Are you using any of these two?

Also, `nlay` is editable and you can customize it anytime.