Check out the docs on hackage, and install with a:
cabal install directory-tree
or if you're on debian it looks like there are packages available:
$ apt-get install libghc-directory-tree-dev
A simple directory-like tree datatype, with useful IO functions, for Haskell
HaskellNOASSERTION
Check out the docs on hackage, and install with a:
cabal install directory-tree
or if you're on debian it looks like there are packages available:
$ apt-get install libghc-directory-tree-dev