title: bcrypt not installing on ubuntu
body: <p><strong>I tried to install <code>bcrypt</code> in Ubuntu but got following error. I can't understand error message properly.</strong>  Here is some discussion regarding to the same problem : <a href="https://github.com/ncb000gt/node.bcrypt.js/issues/90">https://github.com/ncb000gt/node.bcrypt.js/issues/90</a> but still no solution found. </p>
  
  <p>I have also tried to update npm(<code>npm install -g npm</code>) and installing the bcrypt with no luck.    </p>
  
  <pre><code>isha@isha-ubuntu:~/Documents/xpressnepal$ sudo npm install
  npm http GET https://registry.npmjs.org/bcrypt/0.7.7
  npm http 304 https://registry.npmjs.org/bcrypt/0.7.7
  npm http GET https://registry.npmjs.org/bindings/1.0.0
  npm http 304 https://registry.npmjs.org/bindings/1.0.0
  
  &gt; bcrypt@0.7.7 install /home/isha/Documents/xpressnepal/node_modules/bcrypt
  &gt; node-gyp rebuild
  
  gyp ERR! configure error 
  gyp ERR! stack Error: "pre" versions of node cannot be installed, use the --nodedir flag instead
  gyp ERR! stack     at install (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/install.js:65:16)
  gyp ERR! stack     at Object.self.commands.(anonymous function) [as install] (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/node-gyp.js:66:37)
  gyp ERR! stack     at getNodeDir (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:150:20)
  gyp ERR! stack     at /usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:93:9
  gyp ERR! stack     at ChildProcess.exithandler (child_process.js:694:7)
  gyp ERR! stack     at ChildProcess.EventEmitter.emit (events.js:107:17)
  gyp ERR! stack     at maybeClose (child_process.js:817:16)
  gyp ERR! stack     at Process.ChildProcess._handle.onexit (child_process.js:884:5)
  gyp ERR! System Linux 3.8.0-19-generic
  gyp ERR! command "node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
  gyp ERR! cwd /home/isha/Documents/xpressnepal/node_modules/bcrypt
  gyp ERR! node -v v0.11.11-pre
  gyp ERR! node-gyp -v v0.12.2
  gyp ERR! not ok 
  npm ERR! bcrypt@0.7.7 install: `node-gyp rebuild`
  npm ERR! Exit status 1
  npm ERR! 
  npm ERR! Failed at the bcrypt@0.7.7 install script.
  npm ERR! This is most likely a problem with the bcrypt package,
  npm ERR! not with npm itself.
  npm ERR! Tell the author that this fails on your system:
  npm ERR!     node-gyp rebuild
  npm ERR! You can get their info via:
  npm ERR!     npm owner ls bcrypt
  npm ERR! There is likely additional logging output above.
  
  npm ERR! System Linux 3.8.0-19-generic
  npm ERR! command "node" "/usr/local/bin/npm" "install"
  npm ERR! cwd /home/isha/Documents/xpressnepal
  npm ERR! node -v v0.11.11-pre
  npm ERR! npm -v 1.3.26
  npm ERR! code ELIFECYCLE
  npm ERR! 
  npm ERR! Additional logging details can be found in:
  npm ERR!     /home/isha/Documents/xpressnepal/npm-debug.log
  npm ERR! not ok code 0
  isha@isha-ubuntu:~/Documents/xpressnepal$ 
  </code></pre>