[greysteil]

I worked with @iarna over at npm to get a very similar bug fixed - https://github.com/npm/npm/pull/20198. I'm pretty sure this is just a special case of that bug - if you're not on npm 6.1.0 it might be fixed there. Otherwise I'd encourage you to comment in on that PR / the attached issue with a flow to reproduce.

[WorldMaker]

Excellent news. Is this fix likely to fix prune by chance as well?

(That's been bloating my Electron packages for a bit in that I haven't been able to trust prune --dev not to prune dependencies of a git package.)