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I want to install Leksah so I can learn how to code in Haskell. So I've installed the latest version of ghc (correctly I hope). But I lack the latest version of Cabal for Leksah. I cannot seem to install it. I have version 1.24 while the latest is 1.24. I've updated Cabal before going through the following, as well as downloaded version 1.24. I still get the following responses. When I try to install in terminal by typing:

cabal install cabal cabal-install

I get the following response:

Resolving dependencies...
cabal: Could not resolve dependencies:
trying: cabal-0.0.0.0 (user goal)
next goal: youProbablyWantCapitalCabal (dependency of cabal-0.0.0.0)
Dependency tree exhaustively searched.

When I type the following:

cabal install foo

I get the following response:

Resolving dependencies...
cabal: Could not resolve dependencies:
trying: foo-1.0 (user goal)
trying: base-4.8.2.0/installed-0d6... (dependency of foo-1.0)
trying: containers-0.5.6.2/installed-593... (dependency of foo-1.0)
next goal: haskell98 (dependency of foo-1.0)
rejecting: haskell98-2.0.0.3 (conflict: base==4.8.2.0/installed-0d6...,
haskell98 => base>=4.7 && <4.8)
rejecting: haskell98-2.0.0.2 (conflict: base==4.8.2.0/installed-0d6...,
haskell98 => base==4.6.*)
rejecting: haskell98-2.0.0.1 (conflict: containers =>
array==0.5.1.0/installed-960..., haskell98 => array>=0.3 && <0.5)
rejecting: haskell98-2.0.0.0 (conflict: containers =>
array==0.5.1.0/installed-960..., haskell98 => array>=0.3 && <0.4)
rejecting: haskell98-1.1.0.1, 1.1.0.0, 1.0.1.1 (conflict:
base==4.8.2.0/installed-0d6..., haskell98 => base>=3 && <4.6)
rejecting: haskell98-1.0.1.0 (conflict: base==4.8.2.0/installed-0d6...,
haskell98 => base<4.6)
rejecting: haskell98-1.0 (conflict: base==4.8.2.0/installed-0d6..., 
haskell98
=> base<4.3)
Dependency tree exhaustively searched.

I even downloaded cabal 1.24. Terminal tells me I currently have version 1.22.6 installed and that I'm using version 1.22.5 of the Cabal library.

How can I update Cabal? Should I try installing Leksah without updating Cabal?

A. Bergeron
  • 129

1 Answers1

3

There is a clue in that slightly cryptic error message where it says: next goal: youProbablyWantCapitalCabal (dependency of cabal-0.0.0.0)

The library package is called Cabal not cabal. Try running: cabal install Cabal cabal-install

Zanna
  • 72,312
Hamish Mackenzie
  • 146