cabal install fails

[ferrouswheel]

Probably due to a newer version of ghc.

When trying to compile citeproc-hs 0.2, it says "-fglasgow-exts is deprecated"

Explicitly specifying a higher version "> 0.3", completes installation of all dependencies, but then

Building bibproc-0.1...
Preprocessing executable 'bib2sort' for bibproc-0.1...
[1 of 1] Compiling Main             ( bib2sort.hs, dist/build/bib2sort/bib2sort-tmp/Main.o )

bib2sort.hs:51:35:
    Couldn't match expected type `[Abbrev]'
                with actual type `Reference'
    Expected type: [[Abbrev]]
      Actual type: [Reference]
    In the second argument of `($)', namely `rs'
    In the expression: map (sort_ b) $ rs

(This is mostly a record for when I've learnt enough Haskell that I can decipher and fix it!)