Unresolveable dependencies

[kingcrunch]

In short

$ composer.phar install --dev    
Loading composer repositories with package information
Installing dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - knplabs/knp-gaufrette-bundle 0.2.x-dev requires knplabs/gaufrette ~0.1.7 -> satisfiable by knplabs/gaufrette[0.1.x-dev, v0.1.7].
    - Can only install one of: knplabs/gaufrette[0.2.x-dev, 0.1.x-dev].
    - Can only install one of: knplabs/gaufrette[v0.1.7, 0.2.x-dev].
    - sylius/core-bundle 0.9.x-dev requires knplabs/knp-gaufrette-bundle 0.2.*@dev -> satisfiable by knplabs/knp-gaufrette-bundle[0.2.x-dev].
    - sylius/core-bundle 0.9.x-dev requires knplabs/gaufrette 0.2.*@dev -> satisfiable by knplabs/gaufrette[0.2.x-dev].
    - sylius/web-bundle 0.9.x-dev requires sylius/core-bundle 0.9.*@dev -> satisfiable by sylius/core-bundle[0.9.x-dev].
    - Installation request for sylius/web-bundle 0.9.* -> satisfiable by sylius/web-bundle[0.9.x-dev].

update ends up in the same.

[schuppo]

I had that problem yesterday as well. Today, when I started a new installation from scratch, I ended up first with the error Class 'Doctrine\Bundle\FixturesBundle\DoctrineFixturesBundle' not found which was easy to fix by adding "doctrine/doctrine-fixtures-bundle": "2.2.*", to composer.json. The next missing dependency was 'Liip\DoctrineCacheBundle\LiipDoctrineCacheBundle' which was easy to fix too.
But now I get an InvalidArgumentException which says The class sylius.model.promotion_subject.class does not exists.
What to do?

[pjedrzejewski]

Will be fixed by Sylius/Sylius#1283.

[smarques]

Isn't Liip\DoctrineCacheBundle\LiipDoctrineCacheBundle deprecated in favor of doctrine/doctrine-cache-bundle ?