The following libraries seem not used by any other packages and are missing from Stackage LTS 12:
ghc-HSH ghc-IOSpec ghc-IfElse ghc-MonadCatchIO-mtl ghc-MonadCatchIO-transformers ghc-Stream ghc-arrows ghc-attempt ghc-attoparsec-enumerator ghc-aws (ghc-bdcs) (ghc-bdcs-api) ghc-blaze-builder-enumerator ghc-bloomfilter ghc-bytestring-nums ghc-bytestring-show ghc-bytestring-trie ghc-cabal-file-th ghc-cabal-helper ghc-cautious-file ghc-chalmers-lava2000 ghc-cmark ghc-concatenative (ghc-content-store) ghc-dataenc ghc-date-cache ghc-derive ghc-djinn-ghc ghc-djinn-lib ghc-dotgen ghc-enumerator ghc-esqueleto ghc-failure ghc-fdo-notify ghc-ghc-mtl ghc-ghc-syb-utils ghc-gi-ggit ghc-gi-ostree ghc-gtksourceview2 ghc-lazysmallcheck ghc-maccatcher ghc-magic ghc-mtlparse ghc-netlist ghc-netlist-to-vhdl ghc-publicsuffixlist ghc-ranges ghc-readline ghc-regexpr ghc-servant-options ghc-show ghc-torrent ghc-wl-pprint ghc-zlib-enum
We could probably drop some of them from Fedora.
Jens