For this metric removing "things used to program a computer" is useful as it cuts out the circularity of cithing the Glasgow compiler and libraries. The Learn Haskell so you can program haskell well enough to use a tool used for programming haskell...

This is a useful metric for someone considering programming technology to get something done rather than to learn something. (The "learn something" case here is fine. If you're thinking of it, definitely do it. Learn FP. Learn Haskell. It's useful for your mind and fun!)