title: Error "Cannot find module 'npmlog'" after "npm update -g"
body: <p>I have NVM 0.30.1 and used it to install node.js v5.4.0 (with NPM 3.5.4) on Fedora 22. When I run <code>npm update -g</code>, I receive the following warnings:</p>
  
  <pre><code>npm WARN EBUNDLEOVERRIDE Replacing bundled npm &gt; init-package-json with new installed version
  npm WARN EBUNDLEOVERRIDE Replacing bundled npm &gt; node-gyp with new installed version
  npm WARN EBUNDLEOVERRIDE Replacing bundled npm &gt; npm-install-checks with new installed version
  npm WARN EBUNDLEOVERRIDE Replacing bundled npm &gt; npmlog with new installed version
  npm WARN EBUNDLEOVERRIDE Replacing bundled npm &gt; read-package-json with new installed version
  </code></pre>
  
  <p>And after that, when I run npm I get this error:</p>
  
  <pre><code>module.js:328
      throw err;
      ^
  
  Error: Cannot find module 'npmlog'
      at Function.Module._resolveFilename (module.js:326:15)
      at Function.Module._load (module.js:277:25)
      at Module.require (module.js:354:17)
      at require (internal/module.js:12:17)
      at /home/peflorencio/.nvm/versions/node/v5.4.0/lib/node_modules/npm/bin/npm-cli.js:20:13
      at Object.&lt;anonymous&gt; (/home/peflorencio/.nvm/versions/node/v5.4.0/lib/node_modules/npm/bin/npm-cli.js:76:3)
      at Module._compile (module.js:398:26)
      at Object.Module._extensions..js (module.js:405:10)
      at Module.load (module.js:344:32)
      at Function.Module._load (module.js:301:12)
  </code></pre>
  
  <p>Does anyone know what it is and how to solve it?</p>
  
  <p>Thanks</p>