Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: maid (user goal)
rejecting: maid-2014.10.14, 2014.8.31, 2013.9.14, 2013.9.13, 2012.1.19,
2011.10.13, 2011.10.12, 2011.6.21, 2011.6.20, 2010.9.29, 2010.9.19,
2010.9.9.1, 2010.9.9, 2010.4.24, 2009.12.20, 2009.8.25 (global constraint
requires ==2009.8.18)
trying: maid-2009.8.18
trying: base-4.8.1.0/installed-4f7... (dependency of maid-2009.8.18)
trying: hack-handler-evhttp-2009.8.4 (dependency of maid-2009.8.18)
next goal: bytestring-class (dependency of hack-handler-evhttp-2009.8.4)
rejecting: bytestring-class-0.0.0.1, 0.0.0 (conflict:
base==4.8.1.0/installed-4f7..., bytestring-class => base<4.4)
Dependency tree exhaustively searched.