ekalinin/nodeenv — pull request #100 by vincentbernat (2014-08-20 21:09:27+00:00)
Title: npm: use npm_config_prefix instead of NPM_CONFIG_PREFIX

Recent versions of npm (at least 1.4.21) doesn't accept
NPM_CONFIG_PREFIX being valid. They expect the lower-case version
instead. Since I don't know for sure that older versions also accept
that, I keep both of them.