Add fix for https://github.com/pypa/pip/issues/2438
Add fix for https://github.com/pypa/pip/issues/2438

Closes https://github.com/inboxapp/inbox/issues/119

PriviPK/privipk-sync-engine,Eagles2F/sync-engine,PriviPK/privipk-sync-engine,closeio/nylas,nylas/sync-engine,wakermahmud/sync-engine,wakermahmud/sync-engine,EthanBlackburn/sync-engine,gale320/sync-engine,ErinCall/sync-engine,Eagles2F/sync-engine,Eagles2F/sync-engine,nylas/sync-engine,ErinCall/sync-engine,PriviPK/privipk-sync-engine,closeio/nylas,PriviPK/privipk-sync-engine,EthanBlackburn/sync-engine,jobscore/sync-engine,ErinCall/sync-engine,nylas/sync-engine,EthanBlackburn/sync-engine,Eagles2F/sync-engine,PriviPK/privipk-sync-engine,wakermahmud/sync-engine,Eagles2F/sync-engine,closeio/nylas,jobscore/sync-engine,gale320/sync-engine,jobscore/sync-engine,closeio/nylas,jobscore/sync-engine,ErinCall/sync-engine,ErinCall/sync-engine,EthanBlackburn/sync-engine,wakermahmud/sync-engine,gale320/sync-engine,gale320/sync-engine,gale320/sync-engine,EthanBlackburn/sync-engine,wakermahmud/sync-engine,nylas/sync-engine