I'm using **matchdep** to read dependencies from my `package.json` file into `grunt`.

```
require('matchdep').filterAll('grunt-*').forEach(grunt.loadNpmTasks);

```

I have my dependencies split between `dependencies` (for everyone) and `devDependencies` (for front-end developers.) 

Our back-end devs will run the following to get a build of the static assets without requiring jasmine, phantomJS, etc (things that will be run by front-end devs and the CI server)

```
$ npm install --production
$ grunt build

```

However, when using the `--production` build, `grunt.loadNpmTasks()` will emit a warning for any missing packages. 

```
>> Local Npm module "grunt-contrib-watch" not found. Is it installed?

```

**Is there a way to supress this warning?**