Re: Re[2]: [Haskell-cafe] EDSL for Makefile

mention_only_once file action = do   want [file]   file *> action

main = mention_only_once "file1" $ \x -> do need ["file2"]                                            putStrLn "Hello"                                            putStrLn "World"

Thanks Bulat .... I guess even this should work - main = do let file1="file1"  want [file1]  file1 *> \x -> do    need ["file2"]    putStrLn "Hello"    putStrLn "World" -- Regards, Kashyap