Sencha Touch 2.3 - Sass @mixin Breaks Sencha App Build

Just upgraded to Sencha Touch 2.3 - everything is great until I added my Sass mixins, and tried 'sencha app build'... update / note: 'sencha app watch' also causes the same erro

Solution 1:

I got this response in the Sencha forums: You can specify the path to the version of ruby to use in YouApp/.sencha/app/default.properties

So I added this line in said file:

build.ruby.path=/Users/jakef/.rvm/rubies/ruby-2.1.1/bin/ruby

And it worked!