Resolving dependencies... cabal: Could not resolve dependencies: [__0] next goal: haskoin-store-data (user goal) [__0] rejecting: haskoin-store-data-0.25.2, haskoin-store-data-0.25.1 (constraint from user target requires ==0.25.0) [__0] trying: haskoin-store-data-0.25.0 [__1] trying: haskoin-core-0.13.3 (dependency of haskoin-store-data) [__2] next goal: secp256k1-haskell (dependency of haskoin-core) [__2] rejecting: secp256k1-haskell-0.2.2, secp256k1-haskell-0.2.1 (conflict: pkg-config package libsecp256k1-any, not found in the pkg-config database) [__2] rejecting: secp256k1-haskell-0.2.0 (conflict: haskoin-core => secp256k1-haskell>=0.2.1) [__2] skipping: secp256k1-haskell-0.1.8, secp256k1-haskell-0.1.7, secp256k1-haskell-0.1.6, secp256k1-haskell-0.1.5, secp256k1-haskell-0.1.4, secp256k1-haskell-0.1.3, secp256k1-haskell-0.1.2, secp256k1-haskell-0.1.1, secp256k1-haskell-0.1.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.2.1' from 'haskoin-core') [__2] fail (backjumping, conflict set: haskoin-core, secp256k1-haskell) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: haskoin-core, haskoin-store-data, secp256k1-haskell