Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: regex-pcre (user goal)
rejecting: regex-pcre-0.94.4, regex-pcre-0.94.3, regex-pcre-0.94.2,
regex-pcre-0.94.1, regex-pcre-0.94, regex-pcre-0.93, regex-pcre-0.92,
regex-pcre-0.91 (constraint from user target requires ==0.82)
trying: regex-pcre-0.82
next goal: base (dependency of regex-pcre-0.82)
rejecting: base-4.9.0.0/installed-4.9... (conflict: regex-pcre => base>=2.0 &&
<3)
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.