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I have a Haskell project that regularly uses a lot of language features, and I want the language extension block for each source file to be the same. Here's a list, {-# LANGUAGE Arrows, BangPatterns, DefaultSignatures, DeriveDataTypeable, DeriveFunctor, EmptyDataDecls, FlexibleContexts, FlexibleInstances, FunctionalDependencies, GADTs, GeneralizedNewtypeDeriving, MultiParamTypeClasses, NamedFieldPuns, NoImplicitPrelude, NoMonomorphismRestriction, OverlappingInstances, RankNTypes, RebindableSyntax, ScopedTypeVariables, StandaloneDeriving, TemplateHaskell, TypeFamilies, TypeOperators, TypeSynonymInstances, UndecidableInstances, ViewPatterns #-} Maybe to some it's bad practice, but I consider language extensions to be part of the "Haskell+" that I usually write code in. And, I want that to be the same across modules. For example, the NoImplicitPrelude changes the language dramatically, and I want it uniform for all modules. Question : How can I achieve this, without copy-pasting the language block into each file? It gets annoying how I often learn a new language feature, add it to module A , then start working on module B , and realize I have to go copy the language block from module A . Just FYI the CPP pragma with a #include does not do the trick! Thanks in advance.

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