title: How to prevent Tmux from filling up the global PATH variable with duplicated paths?
body: <p>I'm using Mac OS X, iTerm2, zsh and Tmux via Homebrew. When I start a Terminal session in iTerm2, the global PATH variable looks still fine. But when I open up a Tmux session the PATH variable is extended with the same paths it already consisted of. I'm going to put a issue solving <a href="https://unix.stackexchange.com/questions/4965/keep-duplicates-out-of-path-on-source">code snippet</a> in my .zshrc, but I'm still interested in the cause why the PATH variable is filled up twice.</p>