Library version choosing of cabal sandbox build

[Johan Tibell]

Cabal is allowed to use any version that fullfills the required bounds. It
uses a heuristic the tends to prefer

 * installed
 * newest
 * other

in that order.

If you want to make sure the newest version is used temporarily you can
pass --constraint="foo-1.2.3.4" to cabal install. If you want to make this
change more permanent you can set an exact version in a cabal.config file
in the same directory as the .cabal file.


On Tue, Jul 15, 2014 at 12:57 PM, Daniel Trstenjak <
daniel.trstenjak at gmail.com> wrote:

>
> dan at machine ~> cabal --version
> cabal-install version 1.20.0.3
> using version 1.20.0.1 of the Cabal library
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