npm peerDependency issue with grunt and flatiron peer

Question

While posting this question I figured out the answer, but I\'ll post both here in case it helps someone else, and perhaps someone can help with the why of w

Answer 1

My mistake was not appending the -g on the npm list command.

npm list -g

Once I did that, I saw my list of globally installed modules (e.g. bower, jshint, mocha), and at the very end:

npm ERR! peer invalid: flatiron@0.3.0 /usr/lib/node_modules/jitsu/node_modules/flatiron
npm ERR! not ok code 0

Then I ran this command to see which ones were using flatiron:

npm list -g flatiron

In this case it was jitsu, a module I'm not using anymore. I ran

sudo npm uninstall -g jitsu
sudo npm uninstall -g grunt

And then ran the original command again. Note for anyone coming later to this question: The correct module for reinstalling grunt command-line globally after the release of 0.4 is now grunt-cli, NOT grunt like when I asked the original question.

If I actually wanted to keep jitsu I could have updated it instead of uninstalling it (thanks @BenAtkin):

npm install -g jitsu

And then run the original command again. See this blog post about peerDependency being added in node 0.8.19 for more background.