Warning: The install command is a part of the legacy v1 style of cabal usage. Please switch to using either the new project style and the new-install command or the legacy v1-install alias as new-style projects will become the default in the next version of cabal-install. Please file a bug if you cannot replicate a working v1- use case with the new-style commands. For more information, see: https://wiki.haskell.org/Cabal/NewBuild Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: spectral-clustering-0.3.2.1 (user goal) [__1] next goal: sparse-linear-algebra (dependency of spectral-clustering) [__1] rejecting: sparse-linear-algebra-0.3.1, sparse-linear-algebra-0.3, sparse-linear-algebra-0.2.9.7, sparse-linear-algebra-0.2.9.6, sparse-linear-algebra-0.2.9.5, sparse-linear-algebra-0.2.9.4, sparse-linear-algebra-0.2.9.9, sparse-linear-algebra-0.2.9.8, sparse-linear-algebra-0.2.9.3, sparse-linear-algebra-0.2.9.2, sparse-linear-algebra-0.2.9.1, sparse-linear-algebra-0.2.9, sparse-linear-algebra-0.2.2.0, sparse-linear-algebra-0.2.1.1, sparse-linear-algebra-0.2.1.0, sparse-linear-algebra-0.2.0.9, sparse-linear-algebra-0.2.0.8, sparse-linear-algebra-0.2.0.7, sparse-linear-algebra-0.2.0.5, sparse-linear-algebra-0.2.0.4, sparse-linear-algebra-0.2.0.3, sparse-linear-algebra-0.2.0.2, sparse-linear-algebra-0.2.0.1, sparse-linear-algebra-0.2.0.0, sparse-linear-algebra-0.1.0.3, sparse-linear-algebra-0.1.0.2, sparse-linear-algebra-0.1.0.1, sparse-linear-algebra-0.1.0.0 (conflict: spectral-clustering => sparse-linear-algebra>=0.3.2) [__1] fail (backjumping, conflict set: sparse-linear-algebra, spectral-clustering) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: spectral-clustering, sparse-linear-algebra