[y03a]

Do you know if installing Portacle will mess with any existing configurations of those things on Linux? In particular Emacs. I have everything backed up but, since I only plan to play with CL, I don't want the headache if it does.

[Shinmera]

It should not touch anything outside of its own directory. If it does, then that's a bug and needs to be fixed.

[vindarel]

test in peace, it doesn't interfere with your emacs config or anything else :)

[phoe-krk]

No, it won't. Portacle is 100% self-contained and does not modify anything outside its home directory.