libraries/unix: ghc-cabal: No buildable component found

[Karel Gardas]

Hello,

I'm trying to build GHC cross-compiler to RTEMS OS, but I'm stuck on 
getting this error message from ghc-cabal while configuring libraries/unix:

ghc-cabal: No buildable component found
gmake[1]: *** [libraries/unix/dist-install/package-data.mk] Error 1

I'm not able to find out under which condition(s) cabal signals "no 
buildable component found" on this particular library. Any idea?

Thanks a lot!
Karel