npm install issue

[vpnsecure]

yp ERR! build error
gyp ERR! stack Error: make failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
gyp ERR! stack at emitTwo (events.js:87:13)
gyp ERR! stack at ChildProcess.emit (events.js:172:7)
gyp ERR! stack at Process.ChildProcess._handle.onexit (internal/child_process.js:200:12)
gyp ERR! System Linux 3.10.0-327.22.2.el7.x86_64
gyp ERR! command "/usr/bin/node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /root/fitbit-leaderboard/node_modules/grunt-sass/node_modules/node-sass
gyp ERR! node -v v4.4.7
gyp ERR! node-gyp -v v3.3.1
gyp ERR! not ok
Build failed
npm ERR! Linux 3.10.0-327.22.2.el7.x86_64
npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "install"
npm ERR! node v4.4.7
npm ERR! npm v2.15.8
npm ERR! code ELIFECYCLE

npm ERR! node-sass@0.9.3 install: node build.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@0.9.3 install script 'node build.js'.
npm ERR! This is most likely a problem with the node-sass package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node build.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs node-sass
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR! npm owner ls node-sass
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /root/fitbit-leaderboard/npm-debug.log
fitbit-leaderboard-putty.zip
npm-debug.zip