Same. Short it nice, but it has to be unique and memorable too. Aux is an already existing word.
Things that don't exist yet
- Lunix - sounds like linux and nix just with i and u swapped
- Originix - very close to https://orignix.com/ but not the same
- Nunix - New Nix
- Froxin - Jumble of fork + nix
- Apenix - Apex of nix
- Nirofs - Nix Is a Read Only FileSystem
Suprisingly already exist
- Nuxor - Lindt Nuxor is a chocolate
- Aunix - auxiliary nix - https://www.aunixinternational.com/ already exists though
- XiniX - a mirror of nix (xinix.nl exists though)
- Lixin - shit this also exists as a brand
- Fornix - fork + nix - is part of our brain
- nixzen - spanish company
- zenix - Zenith of nix - another spanish company?
- Apaux - Apex of auxiliary nix - surprisingly is a band
- Araknix - some toy
- naaix - sounds like nice - is a damn boat company
Probably some LLM could come up with something too given a good prompt.