Resolving dependencies... cabal: Could not resolve dependencies: [__0] trying: glirc-2.39 (user goal) [__1] trying: irc-core-2.10 (dependency of glirc) [__2] next goal: attoparsec (dependency of glirc) [__2] rejecting: attoparsec-0.14.4 (conflict: irc-core => attoparsec>=0.13 && <0.14) [__2] skipping: attoparsec-0.14.3, attoparsec-0.14.2, attoparsec-0.14.1 (has the same characteristics that caused the previous version to fail: excluded by constraint '>=0.13 && <0.14' from 'irc-core') [__2] rejecting: attoparsec-0.13.2.5 (conflict: glirc => attoparsec^>=0.14) [__2] skipping: attoparsec-0.13.2.4, attoparsec-0.13.2.3, attoparsec-0.13.2.2, attoparsec-0.13.2.1, attoparsec-0.13.2.0, attoparsec-0.13.1.0, attoparsec-0.13.0.2, attoparsec-0.13.0.1, attoparsec-0.13.0.0, attoparsec-0.12.1.6, attoparsec-0.12.1.5, attoparsec-0.12.1.4, attoparsec-0.12.1.3, attoparsec-0.12.1.2, attoparsec-0.12.1.1, attoparsec-0.12.1.0, attoparsec-0.12.0.0, attoparsec-0.11.3.4, attoparsec-0.11.3.3, attoparsec-0.11.3.2, attoparsec-0.11.3.1, attoparsec-0.11.3.0, attoparsec-0.11.2.1, attoparsec-0.11.1.0, attoparsec-0.10.4.0, attoparsec-0.10.3.0, attoparsec-0.10.2.0, attoparsec-0.10.1.1, attoparsec-0.10.1.0, attoparsec-0.10.0.3, attoparsec-0.10.0.2, attoparsec-0.10.0.1, attoparsec-0.10.0.0, attoparsec-0.9.1.2, attoparsec-0.9.1.1, attoparsec-0.9.0.0, attoparsec-0.8.6.1, attoparsec-0.8.6.0, attoparsec-0.8.5.3, attoparsec-0.8.5.2, attoparsec-0.8.5.1, attoparsec-0.8.5.0, attoparsec-0.8.4.0, attoparsec-0.8.3.0, attoparsec-0.8.2.0, attoparsec-0.8.1.1, attoparsec-0.8.1.0, attoparsec-0.8.0.2, attoparsec-0.8.0.1, attoparsec-0.8.0.0, attoparsec-0.7.2, attoparsec-0.7.1, attoparsec-0.6, attoparsec-0.5.1, attoparsec-0.5, attoparsec-0.4 (has the same characteristics that caused the previous version to fail: excluded by constraint '^>=0.14' from 'glirc') [__2] fail (backjumping, conflict set: attoparsec, glirc, irc-core) After searching the rest of the dependency tree exhaustively, these were the goals I've had most trouble fulfilling: glirc, attoparsec, irc-core