Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: breve (user goal)
rejecting: breve-0.4.3.0, breve-0.4.2.0, breve-0.4.1.0, breve-0.4.0.0,
breve-0.3.0.0, breve-0.2.0.0, breve-0.1.1.0, breve-0.1.0.0, breve-0.0.4.0
(constraint from user target requires ==0.0.3.0)
trying: breve-0.0.3.0
trying: base-4.9.0.0/installed-4.9... (dependency of breve-0.0.3.0)
next goal: transformers (dependency of breve-0.0.3.0)
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,
transformers-0.4.3.0, transformers-0.4.2.0, transformers-0.4.1.0 (conflict:
breve => transformers==0.3.*)
rejecting: transformers-0.3.0.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.8 || >=1.0 && <2)
rejecting: 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: breve => transformers==0.3.*)
Dependency tree exhaustively searched.