Resolving dependencies...
cabal: Could not resolve dependencies:
trying: base-4.9.0.0/installed-4.9... (dependency of penny-bin-0.4.0.0)
next goal: matchers (dependency of penny-lib-0.4.0.0)
rejecting: matchers-0.24.0.0, matchers-0.22.0.0, matchers-0.20.0.0,
matchers-0.18.0.0, matchers-0.16.0.0, matchers-0.14.0.2, matchers-0.14.0.0,
matchers-0.12.0.0, matchers-0.10.0.0, matchers-0.8.0.0, matchers-0.6.0.0,
matchers-0.4.0.0 (conflict: penny-lib => matchers==0.2.*)
trying: matchers-0.2.0.0
next goal: regex-tdfa (dependency of matchers-0.2.0.0)
rejecting: regex-tdfa-1.2.2, regex-tdfa-1.2.1, regex-tdfa-1.2.0 (conflict:
matchers => regex-tdfa==1.1.*)
rejecting: regex-tdfa-1.1.8, regex-tdfa-1.1.7, regex-tdfa-1.1.6,
regex-tdfa-1.1.4, regex-tdfa-1.1.3, regex-tdfa-1.1.2, regex-tdfa-1.1.1,
regex-tdfa-1.1.0 (conflict: base==4.9.0.0/installed-4.9..., regex-tdfa =>
base>=4.0 && <4.7 || <4.0)
rejecting: regex-tdfa-1.0.0, regex-tdfa-0.97.4, regex-tdfa-0.97.3,
regex-tdfa-0.97.1, regex-tdfa-0.95.2, regex-tdfa-0.95.1, regex-tdfa-0.94,
regex-tdfa-0.92 (conflict: matchers => regex-tdfa==1.1.*)
Dependency tree exhaustively searched.