This is the source for my site.

It's a Jekyll site, and the site is packaged with Nix. This means that you can enter a dev shell by running nix develop in this directory, and then you can run jekyll build or jekyll serve -DH0.0.0.0 as normal.

In CI, you can run:

JEKYLL_ENV=production nix develop --ignore-environment --keep JEKYLL_ENV -c jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"

If you have direnv and nix-direnv installed, you can create a file called .envrc with the following contents:

use flake

which will then automatically give you access to Jekyll when you cd into the directory.