This is a repository to accompany this blog post that I made.
It contains a tool I built to give me a CSV to investigate the disk size used by packages and their dependencies with Nix-built software. The tool also generates a graphviz file, but for large builds it gets quite difficult to navigate, even with some visualiser that adds interactivity to the graph.
This repository also contains the config I reached at the end of the blog post.
You can build it with nix build .#systems.bare.toplevel.
Note: I haven't really tested if the config still generates a working system because I gave up on that.