Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: midimory-0.0.2.3 (user goal) [__1] trying: wxcore-0.92.3.0 (dependency of midimory) [__2] trying: wxdirect-0.92.3.0 (dependency of wxcore) [__3] next goal: process (dependency of wxdirect) [__3] rejecting: process-1.6.17.0/installed-1.6.17.0 (conflict: wxdirect => process>=1.1 && <1.5) [__3] skipping: process-1.6.18.0, process-1.6.17.0, process-1.6.16.0, process-1.6.15.0, process-1.6.14.0, process-1.6.13.2, process-1.6.13.1, process-1.6.12.0, process-1.6.11.0, process-1.6.10.0, process-1.6.9.0, process-1.6.8.2, process-1.6.8.1, process-1.6.8.0, process-1.6.7.0, process-1.6.6.0, process-1.6.5.1, process-1.6.5.0, process-1.6.4.0, process-1.6.3.0, process-1.6.2.0, process-1.6.1.0, process-1.6.0.0, process-1.5.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=1.1 && <1.5' from 'wxdirect') [__3] trying: process-1.4.3.0 [__4] next goal: unix (dependency of process) [__4] rejecting: unix-2.8.1.0/installed-2.8.1.0 (conflict: process => unix>=2.5 && <2.8) [__4] skipping: unix-2.8.5.0, unix-2.8.4.0, unix-2.8.3.0, unix-2.8.2.1, unix-2.8.2.0, unix-2.8.1.1, unix-2.8.1.0, unix-2.8.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=2.5 && <2.8' from 'process') [__4] trying: unix-2.7.3 [__5] next goal: deepseq (dependency of process) [__5] rejecting: deepseq-1.4.8.1/installed-1.4.8.1 (conflict: process => base>=4.4 && <4.11, deepseq => base==4.18.1.0/installed-4.18.1.0) [__5] rejecting: deepseq-1.5.0.0 (conflict: process => deepseq>=1.1 && <1.5) [__5] trying: deepseq-1.4.8.1 [__6] next goal: parsec (dependency of wxcore) [__6] rejecting: parsec-3.1.16.1/installed-3.1.16.1 (conflict: process => base>=4.4 && <4.11, parsec => base==4.18.1.0/installed-4.18.1.0) [__6] trying: parsec-3.1.17.0 [__7] next goal: text (dependency of parsec) [__7] rejecting: text-2.0.2/installed-2.0.2 (conflict: process => base>=4.4 && <4.11, text => base==4.18.1.0/installed-4.18.1.0) [__7] trying: text-2.1.1 [__8] next goal: template-haskell (dependency of text) [__8] rejecting: template-haskell-2.20.0.0/installed-2.20.0.0 (conflict: process => base>=4.4 && <4.11, template-haskell => base==4.18.1.0/installed-4.18.1.0) [__8] rejecting: template-haskell-2.21.0.0, template-haskell-2.20.0.0, template-haskell-2.19.0.0, template-haskell-2.18.0.0, template-haskell-2.17.0.0, template-haskell-2.16.0.0, template-haskell-2.15.0.0, template-haskell-2.14.0.0, template-haskell-2.13.0.0, template-haskell-2.12.0.0, template-haskell-2.11.1.0, template-haskell-2.11.0.0, template-haskell-2.10.0.0, template-haskell-2.9.0.0, template-haskell-2.8.0.0, template-haskell-2.7.0.0, template-haskell-2.6.0.0, template-haskell-2.5.0.0, template-haskell-2.4.0.1, template-haskell-2.4.0.0, template-haskell-2.3.0.1, template-haskell-2.3.0.0, template-haskell-2.2.0.0 (constraint from non-upgradeable package requires installed instance) [__8] fail (backjumping, conflict set: process, template-haskell, text) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: directory, filepath, text, base, unix, parsec, template-haskell, pretty, process, wxdirect, deepseq, wxcore, midimory Try running with --minimize-conflict-set to improve the error message.