How to shrinkwrap devDependencies, but not install them unless necessary?

September, 2016:

As others have mentioned as well, there were some huge efforts to enhance the shrinkwrap feature starting with npm v3.10.8.

Thanks to this, it’ll be possible to keep your devDependencies locked while installing only the production dependencies:

npm shrinkwrap --dev
npm install --only=prod

2013 answer:

As stated in the NPM docs:

Since npm shrinkwrap is intended to lock down your dependencies for
production use, devDependencies will not be included unless you
explicitly set the --dev flag when you run npm shrinkwrap. If
installed devDependencies are excluded, then npm will print a warning.
If you want them to be installed with your module by default, please
consider adding them to dependencies instead.

Basically, or you lock down all deps, or only the production deps.

Not even running npm install --dev or npm install --force can transcend the shrinkwrap functionality.