Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: liquid-containers-0.6.4.1 (user goal) [__1] trying: liquidhaskell-0.9.0.2.1 (dependency of liquid-containers) [__2] next goal: ghc (dependency of liquidhaskell) [__2] rejecting: ghc-9.2.4/installed-9.2.4 (conflict: liquidhaskell => ghc^>=9) [__2] skipping: ghc-9.4.4, ghc-9.4.3, ghc-9.4.2, ghc-9.4.1, ghc-9.2.7, ghc-9.2.6, ghc-9.2.5, ghc-9.2.4, ghc-9.2.3, ghc-9.2.2, ghc-9.2.1 (has the same characteristics that caused the previous version to fail: excluded by constraint '^>=9' from 'liquidhaskell') [__2] trying: ghc-9.0.2 [__3] next goal: base (dependency of liquidhaskell) [__3] rejecting: base-4.16.3.0/installed-4.16.3.0 (conflict: ghc => base>=4.11 && <4.16) [__3] skipping: base-4.18.0.0, base-4.17.0.0, base-4.16.4.0, base-4.16.3.0, base-4.16.2.0, base-4.16.1.0, base-4.16.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=4.11 && <4.16' from 'ghc') [__3] rejecting: base-4.15.1.0, base-4.15.0.0, base-4.14.3.0, base-4.14.2.0, base-4.14.1.0, base-4.14.0.0, base-4.13.0.0, base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires installed instance) [__3] fail (backjumping, conflict set: base, ghc, liquidhaskell) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: liquidhaskell, base, ghc, liquid-containers Try running with --minimize-conflict-set to improve the error message.