[Haskell-cafe] how do i resolve these screwy cabal errors

[Anatoly Yakovenko]

package derive-2.3.0.2-ad85bd58710fede3f840a467e84c403e is unusable
due to missing or recursive dependencies:
  haskell-src-exts-1.9.4-e0f8c55bea9fc97376aa3598dfdca6d6
package derive-2.4.1-415d44d2f93198aab5dff67866c17b64 is unusable due
to missing or recursive dependencies:
  haskell-src-exts-1.9.4-e0f8c55bea9fc97376aa3598dfdca6d6


what does that mean?  i reinstalled haskell-src-exts and derive,
doesn't seem to make any difference

Linking dist/build/derive/derive ...
Installing library in /home/anatolyy/.cabal/lib/derive-2.4.1/ghc-6.12.3
Installing executable(s) in /home/anatolyy/.cabal/bin
Registering derive-2.4.1...

/home/anatolyy/.cabal/lib/haskell-src-exts-1.9.4/ghc-6.12.3
Registering haskell-src-exts-1.9.4...

so i cant import Data.DeriveTH