MM4 templating language? (scss in particular)

It’s apparent at this point that the docs are outdated, but it mentions that middleman ships with templating languages for ERb, Haml, Scss, Coffeescript, etc… I’m trying to pass variables into my sass partial, but if i rename _partial.scss to _partial.scss.erb, this sass file is no longer included/compiled. Am I overlooking something?

See my reply here buddy: Pass erb from partials into sass (file)?