Resolving dependencies...
cabal: Could not resolve dependencies:
trying: test-sandbox-compose-0.1.3 (user goal)
trying: http-conduit-2.1.8 (dependency of test-sandbox-compose-0.1.3)
trying: http-client-tls-0.2.2 (dependency of http-conduit-2.1.8)
trying: tls-1.3.3 (dependency of http-client-tls-0.2.2)
trying: cereal-0.5.1.0 (dependency of tls-1.3.3)
trying: yesod-core-1.4.15.1 (dependency of test-sandbox-compose-0.1.3)
trying: clientsession-0.9.1.1 (dependency of yesod-core-1.4.15.1)
next goal: skein (dependency of clientsession-0.9.1.1)
rejecting: skein-1.0.9.3, 1.0.9.2, 1.0.9.1, 1.0.9, 1.0.8.1, 1.0.8, 1.0.7
(conflict: cereal==0.5.1.0, skein => cereal>=0.3 && <0.5)
rejecting: skein-1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0 (conflict:
cereal==0.5.1.0, skein => cereal>=0.3 && <0.4)
rejecting: skein-0.1.0.12, 0.1.0.11, 0.1.0.10, 0.1.0.9, 0.1.0.8, 0.1.0.7,
0.1.0.6, 0.1.0.5, 0.1.0.4, 0.1.0.3, 0.1.0.2, 0.1.0.1, 0.1 (conflict:
clientsession => skein==1.0.*)
Backjump limit reached (change with --max-backjumps).