Build a Minimal NixOS LiveCD with swaywm
Table of Contents
1. problem & solution
1.1. unable to drop root
donot run under root
1.2. in normal user, libseat permission deniened
add user in video group
login as user, not root
1.3. egl error
enable 3D acceleration in VirtualBox
1.4. config files from outside
but it is copied using xoriso to /iso/
so I need to write a systemd service to automagically sync it at boot
1.5. cleanup builds
/nix/store/ takes too much space after build
unlink result nix-store <path>
and there're a few tools for visualising disk size:
https://nixos.wiki/wiki/Cleaning_the_nix_store