Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: secp256k1-haskell (user goal)
[__0] rejecting: secp256k1-haskell-0.4.0 (conflict: pkg-config package
libsecp256k1-any, not found in the pkg-config database)
[__0] rejecting: secp256k1-haskell-0.3.1, secp256k1-haskell-0.3.0,
secp256k1-haskell-0.2.5, secp256k1-haskell-0.2.4, secp256k1-haskell-0.2.3,
secp256k1-haskell-0.2.2, secp256k1-haskell-0.2.1, secp256k1-haskell-0.2.0,
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
(constraint from user target requires ==0.4.0)
[__0] fail (backjumping, conflict set: secp256k1-haskell)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: secp256k1-haskell