guix pack -f docker and profile ?

[zimoun]

Dear,

The command line:

  guix pack                 \
            -f docker       \
            -C none         \
            -S /bin=bin     \
            -S /lib=lib     \
            -S /share=share \
            -S /etc=etc     \
            glibc-utf8-locales coreutils tzdata \
            bash r r-<name-it>

creates a Docker image containing the R interpreter and the R package
<name-it>. Nice!

Then:
  docker run -ti --rm --tmpfs /tmp <image-id> R
launches R inside the Docker. Cool!

However you cannot load the R package <name-it> because it is not in
the load path. Which is annoying but expected.

Instead, one needs to make it with 2 steps:
  docker run -ti --rm --tmpfs /tmp <image-id> bash
then find the <hash> from the folder /gnu/store/<hash>-profile to be
able to source it:
  source /gnu/store/<hash>-profile/etc/profile

Now the R library is found:
  R -e 'library(<name-it>)'


Is it possible to directly have the profile under /etc/ ?
Other said, how to correctly expose the environment variables ?


Thank you in advance.


All the best,
simon