Add /usr/bin/env by default in guixsd?

[Huang\, Ying]

Hi, Ludo,

It is a common practice to use /usr/bin/env in script shabang to use the
interpreter find in PATH.  For example, something as follow,

#!/usr/bin/env python

Although it is not necessary for scripts packaged in guix, if the
scripts are written by a user for his own usage and he don't want to
package it, it is good to have /usr/bin/env available.  In this way, the
interpreters in ~/.guix-profile/bin will be used.

So how about add /usr/bin/env by default in guixsd?

Best Regards,
Huang, Ying