haskell-trifecta: update to version 1.4.3
haskell-units: update to version 2.1
haskell-vinyl: update to version 0.4.3
haskell-wai: update to version 3.0.1
haskell-xml-conduit: update to version 1.2.1
haskell-HaRe: update to version 0.7.2.6
haskell-codex: update to version 0.1.0.3
haskell-hlint: update to version 1.9.1
haskell-haste-perch: drop unsupported package

This package requires a special build process that's not based on Cabal (see
<https://github.com/agocorona/haste-perch/issues/5>). Someone needs to figure
out how to compile and install this stuff in the context of Nix.