> ‘ld-wrapper’ is a wrapper around the linker that adds a -rpath argument
> for each -l argument (see the top of ld-wrapper.scm), such that all the
> needed libraries are in the resulting binary’s RUNPATH.

Could you show how it helps to avoid the need to set environment
variables?

> Please add a docstring here, and then OK to push.

I’ve just pushed.  Please test.