title: node-gyp rebuild 2 error when installing Karma
body: <p>I am trying to install Karma onto OSX v10.9.3.</p>
  
  <p>I open up the terminal and enter <code>npm install -g karma</code>.  When I do this, I get the following output:</p>
  
  <pre><code>mc-s089979% npm install -g karma
  
  &gt; fsevents@0.2.0 install /usr/local/lib/node_modules/karma/node_modules/chokidar/node_modules/fsevents
  &gt; node-gyp rebuild
  
    CXX(target) Release/obj.target/fse/fsevents.o
    SOLINK_MODULE(target) Release/fse.node
    SOLINK_MODULE(target) Release/fse.node: Finished
  
  &gt; ws@0.4.31 install /usr/local/lib/node_modules/karma/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws
  &gt; (node-gyp rebuild 2&gt; builderror.log) || (exit 0)
  
    CXX(target) Release/obj.target/bufferutil/src/bufferutil.o
    SOLINK_MODULE(target) Release/bufferutil.node
    SOLINK_MODULE(target) Release/bufferutil.node: Finished
    CXX(target) Release/obj.target/validation/src/validation.o
    SOLINK_MODULE(target) Release/validation.node
    SOLINK_MODULE(target) Release/validation.node: Finished
  karma@0.12.16 /usr/local/lib/node_modules/karma
  ├── di@0.0.1
  ├── graceful-fs@2.0.3
  ├── rimraf@2.2.8
  ├── colors@0.6.2
  ├── mime@1.2.11
  ├── q@0.9.7
  ├── minimatch@0.2.14 (sigmund@1.0.0, lru-cache@2.5.0)
  ├── optimist@0.6.1 (wordwrap@0.0.2, minimist@0.0.10)
  ├── source-map@0.1.33 (amdefine@0.1.0)
  ├── glob@3.2.11 (inherits@2.0.1, minimatch@0.3.0)
  ├── lodash@2.4.1
  ├── useragent@2.0.8 (lru-cache@2.2.4)
  ├── log4js@0.6.14 (semver@1.1.4, async@0.1.15, readable-stream@1.0.27-1)
  ├── http-proxy@0.10.4 (pkginfo@0.3.0, utile@0.2.1)
  ├── chokidar@0.8.2 (recursive-readdir@0.0.2, fsevents@0.2.0)
  ├── connect@2.12.0 (uid2@0.0.3, methods@0.1.0, cookie-signature@1.0.1, debug@0.8.1, pause@0.0.1, fresh@0.2.0, bytes@0.2.1, qs@0.6.6, raw-body@1.1.2, buffer-crc32@0.2.1, batch@0.5.0, cookie@0.1.0, negotiator@0.3.0, send@0.1.4, multiparty@2.2.0)
  └── socket.io@0.9.17 (base64id@0.1.0, policyfile@0.0.4, redis@0.7.3, socket.io-client@0.9.16)
  </code></pre>
  
  <p>If I then try to execute karma by typing <code>karma</code> in the terminal, I get <code>command not found: karma</code> which suggests that it hasn't been installed.  Looking in the output above, there is an error:  <code>(node-gyp rebuild 2&gt; builderror.log) || (exit 0)</code>.  I've found builderror.log in <code>/usr/local/lib/node_modules/karma/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/builderror.log</code>, however, it is empty.  <code>find</code> couldn't find any other builderror.log files.  Do you know where else to look?</p>
  
  <p>I've tried:</p>
  
  <ul>
  <li><code>npm update</code></li>
  <li><code>npm install karma</code></li>
  <li><code>sudo npm install karma</code></li>
  <li><code>sudo npm install -g karma</code></li>
  </ul>
  
  <p>What else should I try?</p>