Resolving dependencies...
cabal: Could not resolve dependencies:
trying: haste-compiler-0.5.5.0 (user goal)
trying: ghc-8.0.1.20161018/installed-8.0... (dependency of
haste-compiler-0.5.5.0)
next goal: shellmate (dependency of haste-compiler-0.5.5.0)
rejecting: shellmate-0.3.4, shellmate-0.3.3, shellmate-0.3.2.2,
shellmate-0.3.1, shellmate-0.3 (conflict: haste-compiler => shellmate>=0.2.2
&& <0.3)
rejecting: shellmate-0.2.3, shellmate-0.2.2 (conflict: ghc =>
transformers==0.5.2.0/installed-0.5..., shellmate => transformers>=0.3 &&
<0.5)
rejecting: shellmate-0.2.1, shellmate-0.2, shellmate-0.1.6, shellmate-0.1.5,
shellmate-0.1.4, shellmate-0.1.3, shellmate-0.1.2, shellmate-0.1.1,
shellmate-0.1, shellmate-0.3.2.1, shellmate-0.3.2 (conflict: haste-compiler =>
shellmate>=0.2.2 && <0.3)
Dependency tree exhaustively searched.