How to handle broken packages that have been manually installed

[johntyree]

We don't currently tolerate totally broken packages in the system.

For example if you install ipython-3.0.0-1 on Windows, then the solver will try to uninstall it and install a working version as soon as it runs, even if you do nothing else.

$ egginst ipython-3.0.0-1
$ jaguar install
<tries to update ipython>

[cournape]

Handling the case where we do nothing else is straightforward, but a jaguar issue.

Without pinning, I think it is ok to change the package ? What do you think ?

[johntyree]

Even with pinning, this will fail because we create a "don't install the broken package" rule. We might have to rethink that.