Resolving dependencies...
Error: cabal: Could not resolve dependencies:
[__0] trying: squeal-postgresql-0.9.1.0 (user goal)
[__1] trying: records-sop-0.1.1.0 (dependency of squeal-postgresql)
[__2] next goal: base (dependency of squeal-postgresql)
[__2] rejecting: base-4.16.3.0/installed-4.16.3.0 (conflict: records-sop =>
ghc-prim>=0.5 && <0.8, base => ghc-prim==0.8.0/installed-0.8.0)
[__2] rejecting: base-4.17.0.0, base-4.16.4.0, base-4.16.3.0, base-4.16.2.0,
base-4.16.1.0, base-4.16.0.0, base-4.15.1.0, base-4.15.0.0, base-4.14.3.0,
base-4.14.2.0, base-4.14.1.0, base-4.14.0.0, base-4.13.0.0, base-4.12.0.0,
base-4.11.1.0, base-4.11.0.0, base-4.10.1.0, base-4.10.0.0, base-4.9.1.0,
base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0, base-4.7.0.2,
base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0, base-4.5.1.0,
base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0, base-4.3.0.0,
base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0, base-4.0.0.0,
base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable package requires
installed instance)
[__2] fail (backjumping, conflict set: base, records-sop, squeal-postgresql)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, squeal-postgresql, records-sop