Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: cgi (user goal)
rejecting: cgi-3001.3.0.2, cgi-3001.3.0.1, cgi-3001.3.0.0, cgi-3001.2.2.3,
cgi-3001.2.2.2, cgi-3001.2.2.1, cgi-3001.2.2.0, cgi-3001.2.1.0,
cgi-3001.2.0.0, cgi-3001.1.8.5, cgi-3001.1.8.4, cgi-3001.1.8.3,
cgi-3001.1.8.2, cgi-3001.1.8.1, cgi-3001.1.8, cgi-3001.1.7.5, cgi-3001.1.7.4,
cgi-3001.1.7.3, cgi-3001.1.7.2, cgi-3001.1.7.1, cgi-3001.1.7.0,
cgi-3001.1.6.0, cgi-3001.1.5.2, cgi-3001.1.5.1 (constraint from user target
requires ==3001.1.5)
trying: cgi-3001.1.5
next goal: base (dependency of cgi-3001.1.5)
rejecting: base-4.9.0.0/installed-4.9... (conflict: cgi => base>=2.0 && <4.7)
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.