I plan to implement option 1 by adding a "sitecustomize.py" (better
than modify "site.py") into the python packages, and modify
"search-path-specification" to use "GUIX_PYTHON_X_Y_SITE_PACKAGES".

Sorry, do say, but does not work in a virtual environment, since GUIX_PYTHON_X_Y_SITE_PACKAGES will be added unconditionally. Also I assume this will execute site.main() twice.

-- 
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@crazy-compilers.com               |
| www.crazy-compilers.com | compilers which you thought are impossible |