ValueError: jpeg is required unless explicitly disabled using --disable-jpeg, aborting - Missing libjpeg-dev causing the build to fail

[majuric]

This was bugging me for some time but I finally found the cause, it's due to new versions of Pillow ( a dependency of ReviewBoard ) requiring libjpeg-dev already present on the system.

Installing the dependency manually fixed the problem and re-running vagrant provision went on without problems.

More info here: https://pillow.readthedocs.org/en/latest/installation.html

I'll make a pull request for this in case you want the fix.