Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: wai-session-postgresql (user goal)
rejecting: wai-session-postgresql-0.2.1.0, wai-session-postgresql-0.2.0.5,
wai-session-postgresql-0.2.0.4, wai-session-postgresql-0.2.0.3,
wai-session-postgresql-0.2.0.2, wai-session-postgresql-0.2.0.1,
wai-session-postgresql-0.1.1.1, wai-session-postgresql-0.1.1.0 (constraint
from user target requires ==0.1.0.2)
trying: wai-session-postgresql-0.1.0.2
trying: base-4.9.0.0/installed-4.9... (dependency of
wai-session-postgresql-0.1.0.2)
next goal: transformers (dependency of wai-session-postgresql-0.1.0.2)
rejecting: transformers-0.5.2.0/installed-0.5..., transformers-0.5.2.0,
transformers-0.5.1.0, transformers-0.5.0.1, transformers-0.5.0.0 (conflict:
wai-session-postgresql => transformers>=0.4.2 && <0.5)
rejecting: transformers-0.4.3.0, transformers-0.4.2.0 (conflict:
base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.9)
rejecting: transformers-0.4.1.0, transformers-0.3.0.0, transformers-0.2.2.1,
transformers-0.2.1.0, transformers-0.2.0.0, transformers-0.1.4.0,
transformers-0.1.3.0, transformers-0.1.1.0, transformers-0.1.0.1,
transformers-0.0.1.0, transformers-0.0.0.0, transformers-0.5.0.2,
transformers-0.4.0.0, transformers-0.2.2.0, transformers-0.1.0.0 (conflict:
wai-session-postgresql => transformers>=0.4.2 && <0.5)
Dependency tree exhaustively searched.