Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of yesod-platform-1.2.2)
next goal: zlib-conduit (dependency of yesod-platform-1.2.2)
rejecting: zlib-conduit-1.1.0 (conflict: yesod-platform =>
zlib-conduit==1.0.0)
trying: zlib-conduit-1.0.0
next goal: transformers (dependency of zlib-conduit-1.0.0)
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:
zlib-conduit => transformers>=0.2.2 && <0.4)
rejecting: transformers-0.3.0.0, transformers-0.2.2.1 (conflict:
base==4.9.0.0/installed-4.9..., transformers => base>=2 && <4.8 || >=1.0 &&
<2)
rejecting: 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 (conflict: zlib-conduit => transformers>=0.2.2 && <0.4)
rejecting: transformers-0.2.2.0 (conflict: base==4.9.0.0/installed-4.9...,
transformers => base>=2 && <4.6 || >=1.0 && <2)
rejecting: transformers-0.1.0.0 (conflict: zlib-conduit => transformers>=0.2.2
&& <0.4)
Dependency tree exhaustively searched.