Cool article that demonstrates the advantage of GNU Guix over other package management and development environment creation tools. Cyril Roelandt replaced the virtualenv backend in a Python testing utility called Tox with a Guix backend.
http://blogs.rdoproject.org/7843/guix-tox-a-functional-version-of-tox
http://blogs.rdoproject.org/7843/guix-tox-a-functional-version-of-tox
Efraim Flashner likes this.