Resolving dependencies... cabal: Could not resolve dependencies: next goal: hnetcdf (user goal) rejecting: hnetcdf-0.3.0.0, 0.2.2.0, 0.2.1.0 (global constraint requires ==0.2.0.0) trying: hnetcdf-0.2.0.0 trying: transformers-0.4.2.0/installed-21d... (dependency of hnetcdf-0.2.0.0) next goal: either (dependency of hnetcdf-0.2.0.0) rejecting: either-4.4.1, 4.4, 4.3.4.1, 4.3.4, 4.3.3.2, 4.3.3.1, 4.3.3, 4.3.2.1, 4.3.2, 4.3.1, 4.3.0.2, 4.3.0.1, 4.3, 4.1.2, 4.1.1, 4.1, 4.0 (conflict: hnetcdf => either>=3.4.1 && <3.5) rejecting: either-3.4.2, 3.4.1 (conflict: transformers==0.4.2.0/installed-21d..., either => transformers>=0.2 && <0.4) rejecting: either-3.4, 3.3, 3.2, 3.1, 3.0.3, 3.0.2, 3.0.1, 3.0, 0.3.0.1, 0.3, 0.2.3.1, 0.2.3, 0.2.2.3, 0.2.2.2, 0.2.2.1, 0.2.2, 0.2.1, 0.1 (conflict: hnetcdf => either>=3.4.1 && <3.5) Dependency tree exhaustively searched.