Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: leksah (user goal)
rejecting: leksah-0.15.2.0, leksah-0.15.1.4, leksah-0.15.1.3, leksah-0.15.1.2,
leksah-0.15.1.1, leksah-0.15.1.0, leksah-0.15.0.6, leksah-0.15.0.5,
leksah-0.15.0.4, leksah-0.15.0.3, leksah-0.15.0.2, leksah-0.15.0.1,
leksah-0.14.4.0, leksah-0.14.3.0, leksah-0.14.2.0, leksah-0.14.1.1,
leksah-0.14.1.0, leksah-0.14.0.1, leksah-0.14.0.0, leksah-0.13.4.3,
leksah-0.13.4.2, leksah-0.13.4.1, leksah-0.13.4.0, leksah-0.13.3.0,
leksah-0.12.1.3, leksah-0.12.1.2, leksah-0.12.1.0, leksah-0.12.0.3,
leksah-0.10.0.4, leksah-0.10.0.3, leksah-0.10.0.1, leksah-0.10.0.0,
leksah-0.8.0.8, leksah-0.8.0.6, leksah-0.8.0.4, leksah-0.8.0.3,
leksah-0.8.0.1, leksah-0.8 (constraint from user target requires ==0.6.1)
trying: leksah-0.6.1
trying: base-4.9.0.0/installed-4.9... (dependency of leksah-0.6.1)
next goal: regex-base (dependency of leksah-0.6.1)
rejecting: regex-base-0.93.2, regex-base-0.93.1, regex-base-0.93,
regex-base-0.92, regex-base-0.91, regex-base-0.90, regex-base-0.83 (conflict:
leksah => regex-base==0.72.0.2)
trying: regex-base-0.72.0.2
next goal: regex-compat (dependency of leksah-0.6.1)
rejecting: regex-compat-0.95.1, regex-compat-0.93.1 (conflict:
regex-base==0.72.0.2, regex-compat => regex-base>=0.93 || >=0.93 || >=0.93)
rejecting: regex-compat-0.92, regex-compat-0.91 (conflict:
regex-base==0.72.0.2, regex-compat => regex-base>=0.93 || >=0.93)
rejecting: regex-compat-0.90 (conflict: regex-base==0.72.0.2, regex-compat =>
regex-base>=0.80)
rejecting: regex-compat-0.71.0.1 (conflict: base==4.9.0.0/installed-4.9...,
regex-compat => base>=2.0 && <4.8)
rejecting: regex-compat-0.71 (conflict: leksah => regex-compat>=0.71.0.1)
Dependency tree exhaustively searched.