[michael@localhost ~]$ ghc-pkg list mtl
/usr/lib/ghc-6.12.1/package.conf.d
[michael@localhost ~]$
Installed?
Michael
--- On Tue, 7/27/10, Ivan Miljenovic
How do I import Control.Monad.State?
Install and use the mtl library (comes with the Haskell platform), monads-fd (almost identical API to mtl; the point of this is that mtl uses some extension: the non-extension bits are in the transformers library and monads-fd extends transformers by using extensions to implement mtl functionality) or monads-tf (a different approach to what monads-fd does using different extensions). To check if you have mtl installed (substitute the other package names if necessary): ghc-pkg list mtl If it isn't installed, you can use cabal-install to install it: cabal install mtl -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com