Resolving dependencies... Error: cabal: Could not resolve dependencies: [__0] trying: provenience-0.1.2.4 (user goal) [__1] trying: time-1.11.1.1/installed-1.11.1.1 (dependency of provenience) [__2] trying: text-1.2.5.0/installed-1.2.5.0 (dependency of provenience) [__3] trying: template-haskell-2.18.0.0/installed-2.18.0.0 (dependency of text) [__4] trying: pandoc-2.19.2 (dependency of provenience) [__5] trying: skylighting-core-0.13 (dependency of pandoc) [__6] trying: base-4.16.3.0/installed-4.16.3.0 (dependency of provenience) [__7] next goal: aeson (dependency of provenience) [__7] rejecting: aeson-2.1.0.0 (conflict: provenience => aeson>=0.11.3.0 && <1.6) [__7] skipping: aeson-2.0.3.0, aeson-2.0.2.0, aeson-2.0.1.0, aeson-2.0.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.11.3.0 && <1.6' from 'provenience') [__7] rejecting: aeson-1.5.6.0, aeson-1.5.5.1 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, aeson => bytestring>=0.10.8.1 && <0.11.2) [__7] rejecting: aeson-1.5.5.0 (conflict: time => base==4.16.3.0/installed-4.16.3.0, aeson => base(>=4.7.0.0 && <5) && <0) [__7] rejecting: aeson-1.5.4.1 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, aeson => bytestring>=0.10.8.1 && <0.11.2) [__7] rejecting: aeson-1.5.4.0, aeson-1.5.3.0, aeson-1.5.2.0, aeson-1.5.1.0, aeson-1.5.0.0, aeson-1.4.7.1, aeson-1.4.7.0 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, aeson => bytestring>=0.10.8.1 && <0.11) [__7] rejecting: aeson-1.4.6.0, aeson-1.4.5.0, aeson-1.4.4.0 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, aeson +/-bytestring-builder => bytestring>=0.10.8.1 && <0.11) [__7] rejecting: aeson-1.4.3.0, aeson-1.4.2.0, aeson-1.4.1.0, aeson-1.4.0.0, aeson-1.3.1.1, aeson-1.3.1.0, aeson-1.3.0.0, aeson-1.2.4.0, aeson-1.2.3.0, aeson-1.2.2.0 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, aeson +/-bytestring-builder => bytestring>=0.9.2 && <0.11) [__7] rejecting: aeson-1.2.1.0, aeson-1.2.0.0, aeson-1.1.2.0, aeson-1.1.1.0, aeson-1.1.0.0 (conflict: time => base==4.16.3.0/installed-4.16.3.0, aeson => base>=4.5 && <4.13) [__7] rejecting: aeson-1.0.2.1, aeson-1.0.2.0, aeson-1.0.1.0, aeson-1.0.0.0 (conflict: text => bytestring==0.11.3.1/installed-0.11.3.1, aeson +/-bytestring-builder => bytestring>=0.9 && <0.11) [__7] rejecting: aeson-0.11.3.0 (conflict: skylighting-core => aeson>=1.0) [__7] skipping: aeson-0.11.2.1, aeson-0.11.2.0, aeson-0.11.1.4, aeson-0.11.1.3, aeson-0.11.1.2, aeson-0.11.1.1, aeson-0.11.1.0, aeson-0.11.0.0, aeson-0.9.0.1, aeson-0.9.0.0, aeson-0.8.1.1, aeson-0.8.1.0, aeson-0.8.0.2, aeson-0.7.0.6, aeson-0.7.0.4, aeson-0.6.2.1, aeson-0.6.2.0, aeson-0.6.1.0, aeson-0.6.0.2, aeson-0.6.0.1, aeson-0.6.0.0, aeson-0.5.0.0, aeson-0.4.0.1, aeson-0.4.0.0, aeson-0.3.2.14, aeson-0.3.2.13, aeson-0.3.2.12, aeson-0.3.2.11, aeson-0.3.2.10, aeson-0.3.2.9, aeson-0.3.2.8, aeson-0.3.2.7, aeson-0.3.2.6, aeson-0.3.2.5, aeson-0.3.2.4, aeson-0.3.2.3, aeson-0.3.2.2, aeson-0.3.2.1, aeson-0.3.2.0, aeson-0.3.1.1, aeson-0.3.1.0, aeson-0.3.0.0, aeson-0.2.0.0, aeson-0.1.0.0, aeson-0.10.0.0, aeson-0.8.0.1, aeson-0.8.0.0, aeson-0.7.0.5, aeson-0.7.0.3, aeson-0.7.0.2, aeson-0.7.0.1, aeson-0.7.0.0 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=1.0' from 'skylighting-core') [__7] fail (backjumping, conflict set: aeson, provenience, skylighting-core, text, time) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: aeson, provenience, base, text, pandoc, skylighting-core, th-abstraction, template-haskell, primitive, time Try running with --minimize-conflict-set to improve the error message.