Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: git-annex (user goal)
rejecting: git-annex-6.20161118, git-annex-6.20161111, git-annex-6.20161031,
git-annex-6.20161027, git-annex-6.20161012, git-annex-6.20160923,
git-annex-6.20160907, git-annex-6.20160808, git-annex-6.20160619,
git-annex-6.20160613, git-annex-6.20160527 (constraint from user target
requires ==6.20160511)
trying: git-annex-6.20160511
next goal: base (dependency of git-annex-6.20160511)
rejecting: base-4.9.0.0/installed-4.9... (conflict: git-annex => base(>=4.5 &&
<4.9))
rejecting: base-4.9.0.0, base-4.8.2.0, base-4.8.1.0, base-4.8.0.0,
base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1, base-4.6.0.0,
base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0, base-4.3.1.0,
base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0, base-4.1.0.0,
base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from non-upgradeable
package requires installed instance)
Dependency tree exhaustively searched.