Can't install haskell98

[chubin]

$ cabal install haskell98
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: haskell98-2.0.0.3 (user goal)
next goal: base (dependency of haskell98-2.0.0.3)
rejecting: base-4.8.2.0/installed-0d6... (conflict: haskell98 => base>=4.7 &&
<4.8)
rejecting: base-4.9.1.0, 4.9.0.0, 4.8.2.0, 4.8.1.0, 4.8.0.0, 4.7.0.2, 4.7.0.1,
4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0, 4.5.0.0, 4.4.1.0, 4.4.0.0, 4.3.1.0,
4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0, 4.1.0.0, 4.0.0.0, 3.0.3.2, 3.0.3.1 (global
constraint requires installed instance)
Dependency tree exhaustively searched.

Operating system: Fedora 25

$ cabal --version
cabal-install version 1.22.9.0
using version 1.22.5.0 of the Cabal library 

[ezyang]

haskell98 does not support GHC 7.10 and later, alas. See https://mail.haskell.org/pipermail/libraries/2015-October/026309.html

[chubin]

Ok, thank you very much. I did not know this. Could you please say me, what package should I use instead for the following modules?

src/Ebnf2ps.hs:29:8:
    Could not find module ‘Monad’
    Use -v to see a list of the files searched for.

src/Ebnf2ps.hs:31:8:
    Could not find module ‘System’
    Use -v to see a list of the files searched for.

src/Ebnf2ps.hs:32:8:
    Could not find module ‘Time’
    Use -v to see a list of the files searched for.

src/Fonts.hs:20:8:
    Could not find module ‘Char’
    Use -v to see a list of the files searched for.

src/GrammarUnfold.hs:20:8:
    Could not find module ‘List’
    Use -v to see a list of the files searched for.

src/PathExpansion.hs:7:8:
    Could not find module ‘Directory’
    Use -v to see a list of the files searched for.

Or such a replacement is not possible at all?
And I should rewrite the code completely (or at least deeper than do a simple package replacement)?

[ezyang]

Your best bet is to port the code to use the new-style Haskell modules. I don't know of a good porting guide but https://ghc.haskell.org/trac/ghc/wiki/Migration/7.10 might be a place to start.

[chubin]

Thank you, Edward!