Resolving dependencies... cabal: Could not resolve dependencies: next goal: postgrest (user goal) rejecting: postgrest-0.3.2.0, postgrest-0.3.1.1, postgrest-0.3.1.0, postgrest-0.3.0.4, postgrest-0.3.0.3, postgrest-0.3.0.2, postgrest-0.3.0.1, postgrest-0.3.0.0, postgrest-0.2.12.1, postgrest-0.2.12.0, postgrest-0.2.11.1, postgrest-0.2.11.0, postgrest-0.2.10.0, postgrest-0.2.9.1, postgrest-0.2.8.0, postgrest-0.2.7.0, postgrest-0.2.6.0 (constraint from user target requires ==0.2.5.3) trying: postgrest-0.2.5.3 trying: transformers-0.5.2.0/installed-0.5... (dependency of postgrest-0.2.5.3) next goal: optparse-applicative (dependency of postgrest-0.2.5.3) rejecting: optparse-applicative-0.13.0.0, optparse-applicative-0.12.1.0, optparse-applicative-0.12.0.0 (conflict: postgrest => optparse-applicative==0.11.*) rejecting: optparse-applicative-0.11.0.2, optparse-applicative-0.11.0.1, optparse-applicative-0.11.0 (conflict: transformers==0.5.2.0/installed-0.5..., optparse-applicative => transformers>=0.2 && <0.5) rejecting: optparse-applicative-0.10.0, optparse-applicative-0.9.1.1, optparse-applicative-0.9.1, optparse-applicative-0.9.0, optparse-applicative-0.8.1, optparse-applicative-0.8.0.1, optparse-applicative-0.8.0, optparse-applicative-0.7.0.2, optparse-applicative-0.7.0.1, optparse-applicative-0.7.0, optparse-applicative-0.6.0, optparse-applicative-0.5.2.1, optparse-applicative-0.5.2, optparse-applicative-0.5.1, optparse-applicative-0.5.0, optparse-applicative-0.4.3, optparse-applicative-0.4.2, optparse-applicative-0.4.1, optparse-applicative-0.4.0, optparse-applicative-0.3.2, optparse-applicative-0.3.1, optparse-applicative-0.3.0, optparse-applicative-0.2.0, optparse-applicative-0.1.1, optparse-applicative-0.1.0, optparse-applicative-0.0.1 (conflict: postgrest => optparse-applicative==0.11.*) Dependency tree exhaustively searched.