2020
AndrewTropin - Nix vs Guix of 50:44
    https://www.youtube.com/watch?v=S9V-pcTrdL8    
    https://gist.github.com/abcdw/e54807b0a25e61fe2cf1bf8991410f83
    https://www.reddit.com/r/NixOS/comments/9zwiee/nixos_vs_guixsd/eaddvf6/
    https://news.ycombinator.com/item?id=16490027
    ! good nixstore internals overview