Requirements could not be resolved to an installable set of packages

Question

I was trying to install jasonlewis/enhanced-router package in laravel-starter-kit, and when I run composer update it doesn\'t install and gives some errors. Initially I thou

Answer 1

Welcome to the worst feature of Composer!

So the problem is that you have conflict in your dependencies that is hard to spot.

You have a requirement for "laravel/framework": "4.0.*", in your composer.json. You also have a requirement for "zizaco/confide": "dev-master"

Looking in the composer.json for 'zizaco/confide' in github we see:

"illuminate/support": "4.1.x",

The Composer feature that's causing you a problem is that the replace keyword OPERATES GLOBALLY ACROSS THE WHOLE OF PACKAGIST.

So because the 'illuminate/support' package is replace'd by Laravel itself when Composer tries to satisfy the requirement of "illuminate/support": "4.1.x" it actually tries to download laravel version 4.1.x instead.

That clashes with your requirement of laravel version 4.0.* and so the set of dependencies can't be resolved.

I think there may be no trivial solution to your problem.

I was going to suggest specifying an earlier version of zizaco/confide rather than dev-master, that is dependent on illuminate/support version 4.0.x rather than 4.1.x - however that would mean switching from zizaco/confide 3.x to 2.x which is probably not acceptable.

The only other option would be to change your requirement from laravel 4.0.x to 4.1.* - which may or may not be acceptable, based on how much work that would cause you.