So, according to the Octopress official page, it has HAML integration plugin. Naturally, I gave it a try. I backed up my source/_includes/custom/head.html file, converted it to haml and saved it as source/_includes/custom/head.haml. It gave me an error.
I tried doing the same with source/_layouts/page.html file, and it worked like a charm.
My question is, where can I and where can I not use HAML in an Octopress blog?