Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: happstack-clientsession (user goal)
rejecting: happstack-clientsession-7.3.1, happstack-clientsession-7.3.0,
happstack-clientsession-7.2.7, happstack-clientsession-7.2.6,
happstack-clientsession-7.2.5, happstack-clientsession-7.2.4,
happstack-clientsession-7.2.3, happstack-clientsession-7.2.2 (constraint from
user target requires ==7.2.1)
trying: happstack-clientsession-7.2.1
trying: base-4.9.0.0/installed-4.9... (dependency of
happstack-clientsession-7.2.1)
next goal: safecopy (dependency of happstack-clientsession-7.2.1)
rejecting: safecopy-0.9.2, safecopy-0.9.1, safecopy-0.9.0.1, safecopy-0.9.0,
safecopy-0.8.6, safecopy-0.8.5, safecopy-0.8.4, safecopy-0.8.3,
safecopy-0.8.2, safecopy-0.8.1, safecopy-0.8.0, safecopy-0.7.2,
safecopy-0.7.1, safecopy-0.7.0 (conflict: happstack-clientsession =>
safecopy==0.6.*)
rejecting: safecopy-0.6.3, safecopy-0.6.2, safecopy-0.6.1 (conflict:
base==4.9.0.0/installed-4.9..., safecopy => base>=4 && <4.7)
rejecting: safecopy-0.6.0 (conflict: base==4.9.0.0/installed-4.9..., safecopy
=> base>=4 && <4.9)
rejecting: safecopy-0.5.1, safecopy-0.5, safecopy-0.4.3, safecopy-0.4.2,
safecopy-0.4.1, safecopy-0.4, safecopy-0.3, safecopy-0.2, safecopy-0.1
(conflict: happstack-clientsession => safecopy==0.6.*)
Dependency tree exhaustively searched.