When running npm install with the latest 3.2.0. release of Bootstrap I found the following error:
Loading "Gruntfile.js" tasks...ERROR >> AssertionError: args.type is required Warning: Task "dist" not found. Use --force to continue.
This issue can be solved by running the grunt update-shrinkwrap task just after npm install.
With version 3.2.0. Booststrap switch to the npm version of shrinkwrap. Shrinkwrap locks down the versions of a package’s dependencies so that you can control exactly which versions of each dependency will be used when your package is installed.
The Shrinkwrap task should be run whenever Bootstrap’s dependencies change and so you will have to run it after npm install.