[Haskell-cafe] trying to cabal install lambdabot, failure on 'random' package

[Albert Y. C. Lai]

On 11-05-08 03:24 AM, Sean Perry wrote:
> package random-1.0.0.3 requires time-1.2.0.3
> package random-1.0.0.3 requires time-1.2.0.4

In addition to unregistering --user random-1.0.0.3, also unregister 
--user time-1.2.0.4, the real culprit. The real culprit is why you are 
infected with a duplicate random-1.0.0.3. If you let time-1.2.0.4 live, 
the problem will just recur infinitely.

See my
http://www.vex.net/~trebla/haskell/sicp.xhtml
for why this happens and what it costs you. And never "upgrade" packages 
piecemeal like this again.