Resolving dependencies... cabal: Could not resolve dependencies: next goal: glue-example (user goal) rejecting: glue-example-0.4.9, glue-example-0.4.8, glue-example-0.4.7, glue-example-0.4.6, glue-example-0.4.5, glue-example-0.4.4 (constraint from user target requires ==0.4.3) trying: glue-example-0.4.3 trying: base-4.9.0.0/installed-4.9... (dependency of glue-example-0.4.3) next goal: glue-ekg (dependency of glue-example-0.4.3) rejecting: glue-ekg-0.4.9, glue-ekg-0.4.8, glue-ekg-0.4.6, glue-ekg-0.4.5, glue-ekg-0.4.4 (conflict: glue-example => glue-ekg==0.4.3) rejecting: glue-ekg-0.4.3 (conflict: base==4.9.0.0/installed-4.9..., glue-ekg => base>=4.6 && <4.9) rejecting: glue-ekg-0.4.2, glue-ekg-0.4.1 (conflict: glue-example => glue-ekg==0.4.3) Dependency tree exhaustively searched.