Hello, I'm newbie in haskell, so didn't got success bumping package manually. With new GHC gtk does not build with the following error:

     warning: passing argument 1 of 'rts_evalIO' from incompatible pointer type
S:\prog\lang.haskell\ghc\lib/include/RtsAPI.h:202:6: note: expected 'struct Capability **' but argument is of type 'str
ct Capability *'

Are there any simple workarounds or it's hard stuff and it's better for me to wait new release?
The reason I want to hack with new GHC is that on windows there is fixed bug with ghci that doesn't allow to interactively link related libraries.