cabal: cannot configure lax-0.1.0.0. It requires base >=2.1.1 && <4.1 For the dependency on base >=2.1.1 && <4.1 there are these packages: base-3.0.3.1, base-3.0.3.2 and base-4.0.0.0. However none of them are available. base-3.0.3.1 was excluded because of the top level dependency base -any base-3.0.3.2 was excluded because of the top level dependency base -any base-4.0.0.0 was excluded because of the top level dependency base -any