{"action":"opened","issue":{"url":"https://api.github.com/repos/rgbkrk/ipython-notebook-cookbook/issues/20","labels_url":"https://api.github.com/repos/rgbkrk/ipython-notebook-cookbook/issues/20/labels{/name}","comments_url":"https://api.github.com/repos/rgbkrk/ipython-notebook-cookbook/issues/20/comments","events_url":"https://api.github.com/repos/rgbkrk/ipython-notebook-cookbook/issues/20/events","html_url":"https://github.com/rgbkrk/ipython-notebook-cookbook/issues/20","id":78787308,"number":20,"title":"Possible to pin versions installed via extra_packages?","user":{"login":"davidski","id":2313762,"avatar_url":"https://avatars.githubusercontent.com/u/2313762?v=3","gravatar_id":"","url":"https://api.github.com/users/davidski","html_url":"https://github.com/davidski","followers_url":"https://api.github.com/users/davidski/followers","following_url":"https://api.github.com/users/davidski/following{/other_user}","gists_url":"https://api.github.com/users/davidski/gists{/gist_id}","starred_url":"https://api.github.com/users/davidski/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/davidski/subscriptions","organizations_url":"https://api.github.com/users/davidski/orgs","repos_url":"https://api.github.com/users/davidski/repos","events_url":"https://api.github.com/users/davidski/events{/privacy}","received_events_url":"https://api.github.com/users/davidski/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-05-21T02:19:06Z","updated_at":"2015-05-21T02:19:06Z","closed_at":null,"body":"Is it possible to use `extra_packages` to install specific versions of packages into the ipython virtualenv? I was recently bit when a fresh environment I spun up grabbed a newer version of a client lib with different behavior. I'd like to ensure that I'm getting specific versions in the ipython virtual env."}}