HTML2HAML command not found

I installed gems "haml"

and "haml-rails"

. Now I want to convert the erb files to haml using this command:

find . -name '*erb' | \
xargs ruby -e 'ARGV.each { |i| puts "html2haml -r #{i} #{i.sub(/erb$/,"haml")}"}' | \
bash

      

        
        
        
      

    

but it throws this error:

html2haml: command not found

What am I missing?