So they will run on X11 that's from Debian stable? Will for example Emacs read your .Xresources from your home directory?
I've been eyeing this setup with Guix but I have some concerns. If I install a newer version of GCC through Nix/Guix, can I run update-alternatives on it?
Yes, it will run on your system X11 obeying your .Xresources. I have never tried using update-alternatives to replace the system-wide GCC (or any piece of software for that matter).
