I think it's unlikely that pip will be able to easily install something like Sage anytime soon, but one could use conda [1] which is pretty popular in the scientific community, or alternatively
docker [2].
It also seems there's support in the Nix package manager [3] which is actually more powerful than any other package manager I'm aware of (GUIX notwithstanding).
(I realize that this response is probably useless for the Sage author, but hopefully will benefit others who struggle with installation)