Hello there, For your information, the build has been failing for a few days now on both my Windows builders [1][2], basically in the same way. [...] librarieshaskelineSystemConsoleHaskelineBackendWin32.hsc:263:15: No instance for (Applicative (Draw m)) arising from the 'deriving' clause of a data type declaration Possible fix: use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (Monad (Draw m)) librarieshaskelineSystemConsoleHaskelineBackendWin32.hsc:263:21: No instance for (Applicative (Draw m)) arising from the 'deriving' clause of a data type declaration Possible fix: use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (MonadIO (Draw m)) librarieshaskelineSystemConsoleHaskelineBackendWin32.hsc:263:29: No instance for (Applicative (Draw m)) arising from the 'deriving' clause of a data type declaration Possible fix: use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (MonadException (Draw m)) librarieshaskelineSystemConsoleHaskelineBackendWin32.hsc:263:45: No instance for (Applicative (Draw m)) arising from the 'deriving' clause of a data type declaration Possible fix: use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (MonadReader Handles (Draw m)) libraries/haskeline/ghc.mk:4: recipe for target 'libraries/haskeline/dist-install/build/System/Console/Haskeline/Backend/Win32.o' failed make[1]: *** [libraries/haskeline/dist-install/build/System/Console/Haskeline/Backend/Win32.o] Error 1 Makefile:71: recipe for target 'all' failed make: *** [all] Error 2 Could somebody do something with this, or does anybody have hints on how to fix this? Looks like the culprit is the haskeline library. [1] http://haskell.inf.elte.hu/builders/windows-x86-head/34/10.html [2] http://haskell.inf.elte.hu/builders/windows-x86_64-head/29/10.html