Welp, we escape the arguments properly this time since it doesn't work
anymore for some reason but at least it is consistent for both binary-
and shell-based wrappers.
Now, there could be multiple wrappers within the configuration but it
should still result with one derivation unlike the original version.
This could be handy for making package overrides with multiple binaries
(for example, 7Z) while making the interface consistent. This turns out
to be way nicer than I thought which is a good thing.
