Build failure on Windows (CI broken)

[andreasabel]

network/Network/Socket/Unix.hsc

Lines 148 to 152 in 1a8a923

	-- This function does not work on Windows.
	recvFd :: Socket -> IO CInt
	recvFd s = allocaBytes dummyBufSize $ \buf -> do
	(NullSockAddr, _, cmsgs, _) <- recvBufMsg s [(buf,dummyBufSize)] 32 mempty
	case (lookupCmsg CmsgIdFds cmsgs >>= decodeCmsg) :: Maybe [Fd] of

Network\Socket\Unix.hsc:152:22: error:
    Data constructor not in scope: CmsgIdFds :: CmsgId
    Suggested fix:
      Perhaps use ‘CmsgIdFd’ (imported from Network.Socket.Win32.Cmsg)
    |
152 |     case (lookupCmsg CmsgIdFds cmsgs >>= decodeCmsg) :: Maybe [Fd] of

    |                      ^^^^^^^^^

In CI: https://github.com/haskell/network/actions/runs/8386827442/job/22967896871?pr=573#step:9:126

The first bad CI run was: https://github.com/haskell/network/actions/runs/5779705020
Breakage seem to be connected to

• Allow a control message to contain multiple file descriptors (issue #566) #567

[andreasabel]

Excellent, thanks!