Re: [Haskell-cafe] cabal-install problem with alex dependency in bytestring-lexing

On 17 March 2012 09:02, Erik de Castro Lopo wrote:

Ivan Lazar Miljenovic wrote:

...

One trivial solution is to assume ~/.cabal/bin is on the PATH and to ignore system-wide packages, which I think is even *more* sub-optimal (why install a new version of alex when it's already available?).

The tool should only install alex in ~/.cabal/bin if alex is not already available.

So how does it know whether the *correct version* is available? Add --version parsers for every single possible build-tool to cabal-install? -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com http://IvanMiljenovic.wordpress.com