HsFFI.h import doesn't work as installed
After building GHC head I tried to install the 'network' package (version in darcs head).
I got compile errors from including HsFFI.h trying to include 'stg/Types.h' which wasn't installed by the installer (that is, "make install").
I then copied the 'includes/stg' directory from the build directory over into the directory where GHC had been installed, and everything started working.
This was running on Linux, amd64.