Order of manifest and overlapping binaries

[Greg Hogan]

I could not find documentation on this circumstance or how to resolve.
Both 'parallel' and 'moreutils' produce a 'bin/parallel' and only one
can go in the $GUIX_PROFILE.

Creating a container, the latter package overshadows the former
package, as below. Unclear if this is consistent. In my manifest the
former package overshadows the latter (I'd prefer to have parallel's
parallel, but by default I have sorted the listing alphabetically). Is
there a better way to fix this?

Greg

--8<---------------cut here---------------start------------->8---
$ guix shell --container moreutils parallel which coreutils
[env]$ readlink -f `which parallel`
/gnu/store/xd9kbadmrrbpkjs9vl1v9rhgayfxwgbc-parallel-20230422/bin/parallel

guix shell --container parallel moreutils which coreutils
[env]$ readlink -f $(which parallel)
/gnu/store/60zdm9zm0nqm5d97vs30sf4plb2ib5p9-moreutils-0.67/bin/parallel
--8<---------------cut here---------------end--------------->8---

This is operating from a recent guix pull:

--8<---------------cut here---------------start------------->8---
$ guix describe
Generation 44   May 11 2023 17:02:53    (current)
  guix d6f6b57
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: d6f6b57766e95d2fa8af63d4460a2b303ca4d867
--8<---------------cut here---------------end--------------->8---