Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: bff (user goal)
rejecting: bff-0.3.1.2, 0.3.1.1, 0.3.1, 0.3, 0.2 (global constraint requires
==0.1)
trying: bff-0.1
trying: base-4.7.0.1/installed-e4b... (dependency of bff-0.1)
next goal: derive (dependency of bff-0.1)
rejecting: derive-2.5.22, 2.5.21, 2.5.20, 2.5.19, 2.5.18, 2.5.17, 2.5.16,
2.5.15, 2.5.14, 2.5.13, 2.5.12, 2.5.11, 2.5.10, 2.5.9, 2.5.8, 2.5.7, 2.5.6,
2.5.5, 2.5.4, 2.5.3, 2.5.2, 2.5.1, 2.4.2, 2.4.1, 2.4, 2.3.0.2, 2.3.0.1, 2.3.0,
2.2.0, 2.1.0, 2.0.1, 2.0.0, 0.1.4, 0.1.3, 0.1.2 (conflict: bff =>
derive==0.1.1)
trying: derive-0.1.1
trying: derive-0.1.1:+small_base
next goal: packedstring (dependency of derive-0.1.1:+small_base)
rejecting: packedstring-0.1.0.1 (conflict: base==4.7.0.1/installed-e4b...,
packedstring => base<4.4)
rejecting: packedstring-0.1.0.0 (conflict: base==4.7.0.1/installed-e4b...,
packedstring => base<4.3)
Dependency tree exhaustively searched.