How I Packaged a .deb File for NixOS with Flakes

I wanted to run Helium browser on NixOS. Helium only publishes .deb packages on GitHub releases. no AUR, no Nix package, nothing. So I packaged it myself. https://github.com/oxcl/nix-flake-helium-browser The same technique works for any app that ships a .deb but has no Nix package. This covers the full process: grabbing the .deb from a GitHub release, unpacking it, patching the binaries so they run on NixOS, putting it all in a flake, and then writing a NixOS module and a Home Manager module on