How to set system-wide environment variables

We used to use /etc/environment to set system-wide environment variables on Mountain Lion. However, it seems this file is no longer read. Ideally the solution should apply to all users, and we need it to work with ssh console sessions. So we need this to work ssh user@mavericks-machine 'echo $MY_ENV_VAR' So far we've tried: - /etc/launchd.conf Works for all users, but only applies to 'windowed' applications, i.e. works in Terminal, but not in an ssh session. - ~/.profile, ~/.bash_profile etc. Only applies to shells Any suggestions?