Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of
happstack-authenticate-2.3.4.2)
trying: happstack-server-7.4.6.2 (dependency of
happstack-authenticate-2.3.4.2)
next goal: threads (dependency of happstack-server-7.4.6.2)
rejecting: threads-0.5.1.3 (conflict: base==4.9.0.0/installed-4.9..., threads
=> base>=4.4 && <4.9)
rejecting: threads-0.5.1.2, threads-0.5.1.1 (conflict:
base==4.9.0.0/installed-4.9..., threads => base>=4.4 && <4.8)
rejecting: threads-0.5.1.0, threads-0.5.0.3, threads-0.5.0.2, threads-0.5.0.1
(conflict: base==4.9.0.0/installed-4.9..., threads => base>=4.4 && <4.7)
rejecting: threads-0.5 (conflict: base==4.9.0.0/installed-4.9..., threads =>
base>=4.4 && <4.6)
rejecting: threads-0.4.0.2, threads-0.4.0.1, threads-0.4, threads-0.3.1,
threads-0.3, threads-0.2, threads-0.1.0.1, threads-0.1 (conflict:
happstack-server => threads>=0.5)
Backjump limit reached (currently 2000, change with --max-backjumps or try to
run with --reorder-goals).