If you want something functional (written in Haskell), try Shake (http://www.shakebuild.com http://www.shakebuild.com). "Shake build systems are Haskell progra

If you want something functional (written in Haskell), try Shake (http://www.shakebuild.com http://www.shakebuild.com). "Shake build systems are Haskell programs, but can be treated as a powerful version of make with slightly funny syntax. The build system requires no significant Haskell knowledge, and is designed so that most features are accessible by learning the "Shake syntax", without any appreciation of what the underlying Haskell means."