Comparison of my posts' previous banners generated with Stable Diffusion XL with new ones generated with Flux Dev.

In NixOS, there is an old world of Nix channels, environments, and paths, and a new world of Nix flakes, inputs, and outputs. Today, after a long time, I needed to run nix-shell -p foo again, but it kept failing with an error stating that the package could not be found, even though I could find it while searching the stable and unstable channels.