Creating a Hybrid App Using the Mobile SDK CLI

I keep getting the following errors when trying to install the forceios.

C:\>npm install -g cordova forceios
C:\AppData\Roaming\npm\cordova -> C:\AppData\Roaming\npm\node_modules\cordova\bin\cordova
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "cordova" "forceios"
npm ERR! node v4.4.1
npm ERR! npm v2.14.20
npm ERR! code EBADPLATFORM

npm ERR! notsup Unsupported
npm ERR! notsup Not compatible with your operating system or architecture: force
ios@4.1.1
npm ERR! notsup Valid OS: darwin
npm ERR! notsup Valid Arch: any
npm ERR! notsup Actual OS: win32
npm ERR! notsup Actual Arch: x64

npm ERR! Please include the following file with any support request:

Can anyone help me understand what these errors are and how to resolve them?
Thanks!!!!