There is also the possibility to run you programs in a container with a mapped
folder hierarchy, e.g.:

  guix environment -C --expose=/home/foo/bar/bin=/bin -- /home/foo/qux/bin/qux

See "(guix) Invoking guix environment".

I think it's also worth mentioning the practice of including a Guix package
declaration into your source, like https://dthompson.us/projects/haunt.html
does.  It's mostly useful for development packages since stable versions should
preferably be added to Guix itself.

-- 
Pierre Neidhardt