Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: yesod-platform (user goal)
rejecting: yesod-platform-1.2.13.3, 1.2.13.2, 1.2.13.1, 1.2.13, 1.2.12.4,
1.2.12.3, 1.2.12.2, 1.2.12.1, 1.2.12, 1.2.11, 1.2.10, 1.2.9.3, 1.2.9.1, 1.2.9,
1.2.8.2 (global constraint requires ==1.2.8.1)
trying: yesod-platform-1.2.8.1
next goal: yesod-test (dependency of yesod-platform-1.2.8.1)
rejecting: yesod-test-1.5.0.1, 1.5, 1.4.4, 1.4.3.1, 1.4.3, 1.4.2.2, 1.4.2.1,
1.4.2, 1.4.1.1, 1.4.1, 1.4.0.3, 1.4.0.2, 1.4.0.1, 1.4.0, 1.2.6, 1.2.5, 1.2.4,
1.2.3.2, 1.2.3.1, 1.2.3, 1.2.2, 1.2.1.5, 1.2.1.4, 1.2.1.3, 1.2.1.2, 1.2.1.1
(conflict: yesod-platform => yesod-test==1.2.1)
trying: yesod-test-1.2.1
trying: network-2.6.2.1 (dependency of yesod-test-1.2.1)
next goal: xss-sanitize (dependency of yesod-platform-1.2.8.1)
rejecting: xss-sanitize-0.3.5.6, 0.3.5.5, 0.3.5.4, 0.3.5.3, 0.3.5.2, 0.3.5.1
(conflict: yesod-platform => xss-sanitize==0.3.5)
rejecting: xss-sanitize-0.3.5 (conflict: network==2.6.2.1, xss-sanitize =>
network>=2 && <2.6)
rejecting: xss-sanitize-0.3.4.2, 0.3.4.1, 0.3.4, 0.3.3, 0.3.2, 0.3.1.1, 0.3.1,
0.3.0.1, 0.3.0, 0.2.6, 0.2.5, 0.2.4, 0.2.3, 0.2.2, 0.2.1, 0.2.0, 0.1.1, 0.1
(conflict: yesod-platform => xss-sanitize==0.3.5)
Dependency tree exhaustively searched.