cabal install d3js error

1
votes

I got an error when installing d3js. I'm using ghc-7.8.3, cabal-1.22, debian Wheezy.

# cabal install d3js
Resolving dependencies...
cabal: Could not resolve dependencies:
trying: d3js-0.1.0.0 (user goal)
next goal: base (dependency of d3js-0.1.0.0)
rejecting: base-4.7.0.1/installed-1a5... (conflict: d3js => > base>=4.6 && <4.7)
rejecting: base-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.
1
haskellcabal
What is the output of cabal info base? - Willem Van Onsem

1 Answers

4
votes

Cabal's error message could ideally be a lot better in this case. Anyway, what it means is:

  • The package d3js has a dependency on base-4.6.*
  • You're using GHC 7.8, which ships with base-4.7.0.1
  • base is a special package (wired in), so I can't install a new version
  • So, I can't install the package for you with this GHC version

Your options are:

  • Try again with the --allow-newer flag
  • Install GHC 7.6 and try with that