Resolving dependencies...
cabal: Could not resolve dependencies:
trying: secret-santa-0.1.0.0 (user goal)
trying: base-4.7.0.1/installed-e4b... (dependency of secret-santa-0.1.0.0)
next goal: diagrams-cairo (dependency of secret-santa-0.1.0.0)
rejecting: diagrams-cairo-1.3.0.1, 1.3, 1.2.0.7, 1.2.0.6, 1.2.0.5, 1.2.0.4,
1.2.0.3, 1.2.0.2, 1.2.0.1, 1.2, 1.1.0.2, 1.1.0.1, 1.1, 1.0.1.2, 1.0.1.1,
1.0.1, 1.0, 0.7 (conflict: secret-santa => diagrams-cairo==0.6)
rejecting: diagrams-cairo-0.6 (conflict: base==4.7.0.1/installed-e4b...,
diagrams-cairo => base>=4.2 && <4.7)
rejecting: diagrams-cairo-0.5.0.2, 0.5.0.1, 0.5, 0.4, 0.3, 0.2, 0.1.2, 0.1.1,
0.1 (conflict: secret-santa => diagrams-cairo==0.6)
Dependency tree exhaustively searched.