Unable to get started with Coffeescript on windows

I am trying to get coffeescript installed on a windows machine, but am unable to run the coffee command. Here's what I am getting on trying coffee -v on the console:

    Program 'coffee' failed to execute: No application is associated with the specified  file for this operation
    At line:1 char:7
    + coffee <<<<  -v.
    At line:1 char:1
    +  <<<< coffee -v
    + CategoryInfo          : ResourceUnavailable: (:) [], ApplicationFailedException
    + FullyQualifiedErrorId : NativeCommandFailed

I installed node and tried installing coffeescript both through

npm install -g coffee-script@1.1.1 

as well as

npm install -g http://github.com/jashkenas/coffee-script/tarball/master

Powershell is not able to determine the interpreter from the top line of script like a unix shell would. The solution is to specify the Node application yourself:

node ./node_modules/path/to/coffee