Added ruby PATH to enviornment variables still `grunt sass` does not work

Okay first I did this.

>grunt sass
Running "sass:dist" (sass) task
Warning:
You need to have Ruby and Sass installed and in your PATH for this task to work.
More info: https://github.com/gruntjs/grunt-contrib-sass
 Use --force to continue.

Aborted due to warnings.

And I thought this makes sense I need to add path to ruby so I did. Then I checked version of ruby and it did return something

>ruby -v
ruby 2.2.5p319 (2016-04-26 revision 54774) [x64-mingw32]

this means I have ruby installed. Now grunt sass should work but it does not and I am getting same old message. This one:

>grunt sass
Running "sass:dist" (sass) task
Warning:
You need to have Ruby and Sass installed and in your PATH for this task to work.
More info: https://github.com/gruntjs/grunt-contrib-sass
 Use --force to continue.

Aborted due to warnings.

UPDATE

I get following when I run grunt-sass-force:

>grunt sass --force
Running "sass:dist" (sass) task
Warning:
You need to have Ruby and Sass installed and in your PATH for this task to work.
More info: https://github.com/gruntjs/grunt-contrib-sass
 Used --force, continuing.
'sass' is not recognized as an internal or external command,
operable program or batch file.
Warning: Exited with error code 1 Used --force, continuing.

Done, but with warnings.

Solution

It appears that you need to install sass with gem install sass. Without the gem, you can't work with sass in ruby.