(fleek author here) Fleek is a simplified wrapper around Nix Home-Manager, which is used to install and configure the apps that make up your $HOME and shell environment.
This is what I love about Hacker News: post about a random tool I found, and the author shows up! :-)
I came across your blog (and from that, Fleek) as I'm rebuilding my home WSL setup, and I just want a simple way to destroy and rebuild my distros and move my installed apps easily. Would Fleek be a good use-case for this?
https://getfleek.dev/