A nix based setup! It's getting good. Home Manager is activated with

To update things and prove it all compiles (should work):

git add . && \
nix flake update && \
nix flake lock && \
nix run . -- build --flake .

To apply the primary Home Manager flake:

nix run . -- switch --flake .

Some resources

tips and tricks a nice tutorial and another

Somewhat interesting problems solved

• I have multiple flakes for different user names. These just nicely match the current user and can be applied simply.
• Because I'm using GitHub Codespaces as my primary environment, I do some startup script work. Some of this is in the extraEnv part of my shell to manage secrets.