Global install 0.8.7 on Windows

gistfile1.txt

node -v v0.8.7
npm -v 1.1.49

$ npm -g install shifter
npm http GET https://registry.npmjs.org/shifter
npm http 304 https://registry.npmjs.org/shifter
npm ERR! Error: EPERM, mkdir 'c:\Program Files (x86)\nodejs\node_modules\shifter
'
npm ERR!  { [Error: EPERM, mkdir 'c:\Program Files (x86)\nodejs\node_modules\shi
fter']
npm ERR!   errno: 50,
npm ERR!   code: 'EPERM',
npm ERR!   path: 'c:\\Program Files (x86)\\nodejs\\node_modules\\shifter',
npm ERR!   fstream_type: 'Directory',
npm ERR!   fstream_path: 'c:\\Program Files (x86)\\nodejs\\node_modules\\shifter
',
npm ERR!   fstream_class: 'DirWriter',
npm ERR!   fstream_stack:
npm ERR!    [ 'DirWriter._create (c:\\Program Files (x86)\\nodejs\\node_modules\
\npm\\node_modules\\fstream\\lib\\dir-writer.js:36:23)',
npm ERR!      'c:\\Program Files (x86)\\nodejs\\node_modules\\npm\\node_modules\
\mkdirp\\index.js:45:53',
npm ERR!      'Object.oncomplete (fs.js:297:15)' ] }
npm ERR!
npm ERR! Please try running this command again as root/Administrator.

npm ERR! System Windows_NT 6.1.7601
npm ERR! command "c:\\Program Files (x86)\\nodejs\\node.exe" "c:\\Program Files
(x86)\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "-g" "install" "shifter"
npm ERR! cwd c:\Users\jconniff\dev
npm ERR! node -v v0.8.7
npm ERR! npm -v 1.1.49
npm ERR! path c:\Program Files (x86)\nodejs\node_modules\shifter
npm ERR! fstream_path c:\Program Files (x86)\nodejs\node_modules\shifter
npm ERR! fstream_type Directory
npm ERR! fstream_class DirWriter
npm ERR! code EPERM
npm ERR! errno 50
npm ERR! stack Error: EPERM, mkdir 'c:\Program Files (x86)\nodejs\node_modules\s
hifter'
npm ERR! fstream_stack DirWriter._create (c:\Program Files (x86)\nodejs\node_mod
ules\npm\node_modules\fstream\lib\dir-writer.js:36:23)
npm ERR! fstream_stack c:\Program Files (x86)\nodejs\node_modules\npm\node_modul
es\mkdirp\index.js:45:53
npm ERR! fstream_stack Object.oncomplete (fs.js:297:15)
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR!     c:\Users\jconniff\dev\npm-debug.log
npm ERR! not ok code 0