Resolving dependencies...
cabal: Could not resolve dependencies:
next goal: hakyll (user goal)
rejecting: hakyll-4.9.1.0, hakyll-4.9.0.0, hakyll-4.8.3.2, hakyll-4.8.3.1,
hakyll-4.8.3.0 (constraint from user target requires ==4.8.2.0)
trying: hakyll-4.8.2.0
trying: aeson-1.0.2.1 (dependency of yaml-0.8.20)
next goal: pandoc-citeproc (dependency of hakyll-4.8.2.0)
rejecting: pandoc-citeproc-0.10.2.2, pandoc-citeproc-0.10.2.1,
pandoc-citeproc-0.10.2, pandoc-citeproc-0.10.1.4, pandoc-citeproc-0.10.1.3,
pandoc-citeproc-0.10.1.2, pandoc-citeproc-0.10.1.1, pandoc-citeproc-0.10.1,
pandoc-citeproc-0.10 (conflict: hakyll => pandoc-citeproc>=0.4 && <0.10)
rejecting: pandoc-citeproc-0.9.1.1, pandoc-citeproc-0.9.1 (conflict:
aeson==1.0.2.1, pandoc-citeproc => aeson>=0.7 && <0.12)
rejecting: pandoc-citeproc-0.9, pandoc-citeproc-0.8.1.3,
pandoc-citeproc-0.8.1.2, pandoc-citeproc-0.8.1.1, pandoc-citeproc-0.8.1,
pandoc-citeproc-0.8.0.1 (conflict: aeson==1.0.2.1, pandoc-citeproc =>
aeson>=0.7 && <0.11)
rejecting: pandoc-citeproc-0.8, pandoc-citeproc-0.7.4,
pandoc-citeproc-0.7.3.1, pandoc-citeproc-0.7.3, pandoc-citeproc-0.7.2
(conflict: aeson==1.0.2.1, pandoc-citeproc => aeson>=0.7 && <0.10)
rejecting: pandoc-citeproc-0.7.1.1, pandoc-citeproc-0.7.1,
pandoc-citeproc-0.7.0.2, pandoc-citeproc-0.7.0.1, pandoc-citeproc-0.7,
pandoc-citeproc-0.6.0.1, pandoc-citeproc-0.6, pandoc-citeproc-0.5,
pandoc-citeproc-0.4.0.1, pandoc-citeproc-0.4 (conflict: aeson==1.0.2.1,
pandoc-citeproc => aeson>=0.7 && <0.9)
rejecting: pandoc-citeproc-0.3.1, pandoc-citeproc-0.3.0.1,
pandoc-citeproc-0.3, pandoc-citeproc-0.2, pandoc-citeproc-0.1.2.1,
pandoc-citeproc-0.1.2, pandoc-citeproc-0.1.1.2, pandoc-citeproc-0.1.1.1,
pandoc-citeproc-0.1.1, pandoc-citeproc-0.1 (conflict: hakyll =>
pandoc-citeproc>=0.4 && <0.10)
Dependency tree exhaustively searched.