Getting Calibre working with camoufox and browserforge

Hi! I’m pretty new on Nixos, so this might be messy, so this is as much guide to getting Calibre working as a question on how I should do this more elegantly. The Calibre Camoufox-functionality needs a local version of camoufox on Nix, the bundled one wont have a working environment. I created a hacky overlay (the first one so far) to provide Calibre access to camoufox and browserforge. Feast your eyes on this and despair! (final: prev: { calibre = prev.calibre.overrideAttrs (old: { ...