Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: deepseq (dependency of tagged-0.8.5:+deepseq)
rejecting: deepseq-1.4.2.0/installed-1.4... (conflict: deepseq =>
array==0.5.1.1/installed-0.5..., btree-concurrent => array==0.4.*)
trying: deepseq-1.4.2.0
trying: template-haskell-2.11.0.0/installed-2.1... (dependency of
tagged-0.8.5)
next goal: pretty (dependency of template-haskell-2.11.0.0/installed-2.1...)
rejecting: pretty-1.1.3.3/installed-1.1... (conflict: deepseq==1.4.2.0, pretty
=> deepseq==1.4.2.0/installed-1.4...)
rejecting: pretty-1.1.3.4, pretty-1.1.3.3, pretty-1.1.3.2, pretty-1.1.3.1,
pretty-1.1.2.1, pretty-1.1.2.0, pretty-1.1.1.3, pretty-1.1.1.2,
pretty-1.1.1.1, pretty-1.1.1.0, pretty-1.1.0.0, pretty-1.0.1.2,
pretty-1.0.1.1, pretty-1.0.1.0, pretty-1.0.0.0 (conflict: template-haskell =>
pretty==1.1.3.3/installed-1.1...)
Dependency tree exhaustively searched.