Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: test-framework-doctest (user goal)
rejecting: test-framework-doctest-0.2.1.2, 0.2.1.1, 0.2.1 (global constraint
requires ==0.2.0.1)
trying: test-framework-doctest-0.2.0.1
trying: base-4.8.1.0/installed-4f7... (dependency of
test-framework-doctest-0.2.0.1)
next goal: doctest (dependency of test-framework-doctest-0.2.0.1)
rejecting: doctest-0.10.1, 0.10.0, 0.9.13, 0.9.12, 0.9.11.1, 0.9.11, 0.9.10.2,
0.9.10.1, 0.9.10, 0.9.9, 0.9.8, 0.9.7, 0.9.6, 0.9.5.1, 0.9.5, 0.9.4.1, 0.9.4,
0.9.3, 0.9.2.1, 0.9.2, 0.9.1, 0.9.0, 0.8.0.1, 0.8.0, 0.7.0, 0.6.1, 0.6.0.1,
0.6.0 (conflict: test-framework-doctest => doctest>=0.4.0 && <0.6)
rejecting: doctest-0.5.2, 0.5.1 (conflict: base==4.8.1.0/installed-4f7...,
doctest => base>=4.0 && <4.5)
rejecting: doctest-0.5.0, 0.4.2 (conflict: base==4.8.1.0/installed-4f7...,
doctest => base>=4.0 && <4.4)
rejecting: doctest-0.4.1 (conflict: base==4.8.1.0/installed-4f7..., doctest =>
base>=4.0 && <4.5)
rejecting: doctest-0.4.0 (conflict: base==4.8.1.0/installed-4f7..., doctest =>
base>=4.0 && <4.4)
rejecting: doctest-0.3.0 (conflict: test-framework-doctest => doctest>=0.4.0
&& <0.6)
Dependency tree exhaustively searched.