Now I don't have to wait for anything to be included in nixos-unstable
and can simply merge whatever I want whenever I want. This also has the
advantage of not having to specify which input is needed to get a
package from.
Previously I decided against using srb2 in a container due to the poor
performance I experienced. Since I figured out how to use the graphics
from the host inside of the container, performance is no longer an
issue.