Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: haskell-lsp-0.22.0.0 (user goal) [__1] next goal: haskell-lsp-types (dependency of haskell-lsp) [__1] rejecting: haskell-lsp-types-0.21.0.0 (conflict: haskell-lsp => haskell-lsp-types==0.22.*) [__1] skipping: haskell-lsp-types-0.20.0.0, haskell-lsp-types-0.19.0.0, haskell-lsp-types-0.18.0.0, haskell-lsp-types-0.17.0.0, haskell-lsp-types-0.16.0.0, haskell-lsp-types-0.15.0.0, haskell-lsp-types-0.14.0.1, haskell-lsp-types-0.14.0.0, haskell-lsp-types-0.13.0.0, haskell-lsp-types-0.12.1.0, haskell-lsp-types-0.12.0.0, haskell-lsp-types-0.11.0.0, haskell-lsp-types-0.10.0.0, haskell-lsp-types-0.9.0.0, haskell-lsp-types-0.8.2.0, haskell-lsp-types-0.8.0.1, haskell-lsp-types-0.8.0.0, haskell-lsp-types-0.7.0.0, haskell-lsp-types-0.6.0.0, haskell-lsp-types-0.5.0.0, haskell-lsp-types-0.4.0.0, haskell-lsp-types-0.2.2.0, haskell-lsp-types-0.2.1.0, haskell-lsp-types-0.15.0.1 (has the same characteristics that caused the previous version to fail: excluded by constraint '==0.22.*' from 'haskell-lsp') [__1] fail (backjumping, conflict set: haskell-lsp, haskell-lsp-types) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: haskell-lsp, haskell-lsp-types