tsd not installing

[winnemucca]

I initiated npm install tsd -g

However I am getting back

npm WARN deprecated tsd@0.6.5: TSD is deprecated in favor of Typings (https://github.com/typings/typings) - see https://github.com/DefinitelyTyped/tsd/issues/269 for more information
npm WARN deprecated graceful-fs@3.0.8: graceful-fs version 3 and before will fail on newer node releases. Please update to graceful-fs@^4.0.0 as soon as possible.

It is just a warning but when I type tsd --version I am getting

tsd: command not found

[blakeembrey]

Is the global NPM package directory in your shells path?