This is a definitional issue more than a technical one - if you follow the link to the Haskell package documentation [1], the project actually consists of afore

This is a definitional issue more than a technical one - if you follow the link to the Haskell package documentation [1], the project actually consists of aforementioned standard library, plus a Haskell-to-JS compiler. This is a "dialect" of Haskell in the same way that we can speak of the GCC and Intel dialects of C and C++ - both compilers support the same standard, but each supports a different set of non-standard extensions. In this case, the Haste front page notes that it supports most, but not all, GHC extensions to the Haskell standard. [1] http://hackage.haskell.org/package/haste-compiler http://hackage.haskell.org/package/haste-compiler