npm package fails to install "npm ERR! Error: EACCES: permission denied"

npm ERR! Linux 3.4.0+npm ERR! argv "/usr/bin/nodejs""/usr/bin/npm""install""lodash"npm ERR! node v5.10.1npm ERR! npm  v3.8.3npm ERR! path /root/test/node_modules/.staging/lodash-9a2aabe2npm ERR! code EACCESnpm ERR! errno -13npm ERR! syscall renamenpm ERR! Error: EACCES: permission denied, rename '/root/test/node_modules/.staging/lodash-9a2aabe2' ->'/root/test/node_modules/lodash'npm ERR!     at destStatted (/usr/lib/node_modules/npm/lib/install/action/finalize.js:25:7)npm ERR!     at FSReqWrap.oncomplete (fs.js:82:15)npm ERR!npm ERR! Error: EACCES: permission denied, rename '/root/test/node_modules/.staging/lodash-9a2aabe2' ->'/root/test/node_modules/lodash'npm ERR!     at Error (native)npm ERR!  [Error: EACCES: permission denied, rename '/root/test/node_modules/.staging/lodash-9a2aabe2' ->'/root/test/node_modules/lodash']npm ERR!npm ERR! Please try running this command again as root/Administrator.npm ERR! Please include the following file with any support request:npm ERR!     /root/test/npm-debug.log