The :format option is called :format, not :output.
The :format option is called :format, not :output.

ridixcr/sass,JuanitoFatas/sass,Ahnita/sass,stewx/sass,amatsuda/haml,cmpereirasi/sass,dylannnn/sass,chriseppstein/sass,keithpitty/haml,lmetla/sass,PMArtz92/sass,askl56/sass,zaru/sass,macressler/haml,DanteKaris/sass,concord-consortium/haml,amitsuroliya/sass,askl56/sass,xzyfer/sass,nazar-pc/haml,purcell/haml,Nzaga/sass,MetaAshley/sass,liquidmetal/sass,rammy7219/sass,schneems/sass,Nzaga/sass,HugoRLopes/sass,Iamronan/sass,stefanpenner/haml,MetaAshley/sass,stanhu/haml,cmpereirasi/sass,keithpitty/haml,danielfein/sass,Iamronan/sass,amitsuroliya/sass,dylannnn/sass,StephanieMak/sass,dg1dd1ngs/haml,Anshdesire/sass,Andrey-Pavlov/sass,haml/haml,srawlins/sass,oss-practice/sass,mislav/haml,stanhu/haml,xzyfer/sass,JuanitoFatas/sass,rammy7219/sass,nicklima/sass,briangonzalez/sass,Ahnita/sass,StephanieMak/sass,jaroot32/sass,nickg33/sass,zaru/sass,dg1dd1ngs/haml,jaroot32/sass,haml/haml,nazar-pc/haml,tangposmarvin/haml,antonifs/sass,uniba/hamldoc_ja,nicklima/sass,antonifs/sass,Galactix/sass,macressler/haml,tangposmarvin/haml,schneems/sass,ridixcr/sass,sideci-sample/sideci-sample-haml,modulexcite/sass,14113/sass,danielfein/sass,OrenBochman/sass,srawlins/sass,haml/haml,modulexcite/sass,tangposmarvin/sass,HugoRLopes/sass,OrenBochman/sass,chriseppstein/haml,PMArtz92/sass,saper/sass,lmetla/sass,hcatlin/sass,saper/sass,baiyanghese/sass,Industrys/sass,haml/haml,DanteKaris/sass,hcatlin/sass,Andrey-Pavlov/sass,liquidmetal/sass,vio/haml,Anshdesire/sass,Industrys/sass,nickg33/sass,chriseppstein/haml,Galactix/sass,srinivashappy/sass,srinivashappy/sass,tangposmarvin/sass,tenderlove/sass,stewx/sass