{"action":"created","issue":{"url":"https://api.github.com/repos/scrapy/scrapy/issues/1556","labels_url":"https://api.github.com/repos/scrapy/scrapy/issues/1556/labels{/name}","comments_url":"https://api.github.com/repos/scrapy/scrapy/issues/1556/comments","events_url":"https://api.github.com/repos/scrapy/scrapy/issues/1556/events","html_url":"https://github.com/scrapy/scrapy/issues/1556","id":113325508,"number":1556,"title":"`tox` tests fail","user":{"login":"darshanime","id":6951919,"avatar_url":"https://avatars.githubusercontent.com/u/6951919?v=3","gravatar_id":"","url":"https://api.github.com/users/darshanime","html_url":"https://github.com/darshanime","followers_url":"https://api.github.com/users/darshanime/followers","following_url":"https://api.github.com/users/darshanime/following{/other_user}","gists_url":"https://api.github.com/users/darshanime/gists{/gist_id}","starred_url":"https://api.github.com/users/darshanime/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/darshanime/subscriptions","organizations_url":"https://api.github.com/users/darshanime/orgs","repos_url":"https://api.github.com/users/darshanime/repos","events_url":"https://api.github.com/users/darshanime/events{/privacy}","received_events_url":"https://api.github.com/users/darshanime/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-10-26T10:23:12Z","updated_at":"2015-10-26T10:31:39Z","closed_at":null,"body":"I tried running the tests for Scrapy using `$ tox` but I get a compilation error. [Here](https://gist.github.com/darshanime/7f6514961df666a95f05) is the log. "},"comment":{"url":"https://api.github.com/repos/scrapy/scrapy/issues/comments/151094262","html_url":"https://github.com/scrapy/scrapy/issues/1556#issuecomment-151094262","issue_url":"https://api.github.com/repos/scrapy/scrapy/issues/1556","id":151094262,"user":{"login":"jdemaeyer","id":10531844,"avatar_url":"https://avatars.githubusercontent.com/u/10531844?v=3","gravatar_id":"","url":"https://api.github.com/users/jdemaeyer","html_url":"https://github.com/jdemaeyer","followers_url":"https://api.github.com/users/jdemaeyer/followers","following_url":"https://api.github.com/users/jdemaeyer/following{/other_user}","gists_url":"https://api.github.com/users/jdemaeyer/gists{/gist_id}","starred_url":"https://api.github.com/users/jdemaeyer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jdemaeyer/subscriptions","organizations_url":"https://api.github.com/users/jdemaeyer/orgs","repos_url":"https://api.github.com/users/jdemaeyer/repos","events_url":"https://api.github.com/users/jdemaeyer/events{/privacy}","received_events_url":"https://api.github.com/users/jdemaeyer/received_events","type":"User","site_admin":false},"created_at":"2015-10-26T10:31:39Z","updated_at":"2015-10-26T10:31:39Z","body":"Hey @darshanime,\r\n\r\nyou need to install the header files of the `libffi` library (which is not a Python but a C package). Depending on your OS, there should be a `libffi-dev` or similar package available in your package manager. See also [here](https://github.com/SimonSapin/cairocffi/issues/14)."}}