Gulp-ruby-sass: 'bundle' is not recognized as an internal or external command, operative program, or batch file

I am trying to run gulp-ruby-sass on windows.

I am getting the following error:

gulp-ruby-sass: 'bundle' is not recognized as an internal or external command, operative program, or batch file.

• I have successfully installed ruby ​​on my drive c: \ (c: \ Ruby193)

• I also installed SaSS as

gem install sass

(executed here c: \ Ruby193)

• I also set the registration path to c: \ ruby193 in windows

• I am running my gulp from c: \ project \ transformer \ as gulp

I am still getting this error:

gulp-ruby-sass: 'bundle' is not recognized as an internal or external command, runtime program, or batch file.

Can you help with this issue?