MetaModels wird nicht installiert

[Preetz]

Moin zusammen,

irgendwie komme ich mit dem Composer nicht klar.
Ich möchte gerne MetaModels installieren und erhalte folgende Meldung:

$ /usr/bin/env php -d memory_limit=1G -d max_execution_time=900 composer.phar update --no-ansi --no-interaction --prefer-dist --with-dependencies 'metamodels/bundle_all'
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - metamodels/filter_checkbox 2.0.1 requires metamodels/core ~2.0 -> satisfiable by metamodels/core[2.0.0-alpha1, 2.0.0-alpha10, 2.0.0-alpha11, 2.0.0-alpha12, 2.0.0-alpha13, 2.0.0-alpha14, 2.0.0-alpha15, 2.0.0-alpha16, 2.0.0-alpha2, 2.0.0-alpha3, 2.0.0-alpha4, 2.0.0-alpha5, 2.0.0-alpha6, 2.0.0-alpha7, 2.0.0-alpha8, 2.0.0-alpha9, 2.1.x-dev, 2.0.x-dev] but these conflict with your requirements or minimum-stability.
    - metamodels/filter_checkbox 2.0.0 requires metamodels/core ~2.0 -> satisfiable by metamodels/core[2.0.0-alpha1, 2.0.0-alpha10, 2.0.0-alpha11, 2.0.0-alpha12, 2.0.0-alpha13, 2.0.0-alpha14, 2.0.0-alpha15, 2.0.0-alpha16, 2.0.0-alpha2, 2.0.0-alpha3, 2.0.0-alpha4, 2.0.0-alpha5, 2.0.0-alpha6, 2.0.0-alpha7, 2.0.0-alpha8, 2.0.0-alpha9, 2.1.x-dev, 2.0.x-dev] but these conflict with your requirements or minimum-stability.
    - metamodels/bundle_all 2.0.0 requires metamodels/bundle_filter ~2.0 -> satisfiable by metamodels/bundle_filter[2.0.0].
    - metamodels/bundle_filter 2.0.0 requires metamodels/filter_checkbox ~2.0 -> satisfiable by metamodels/filter_checkbox[2.0.0, 2.0.1].
    - Installation request for metamodels/bundle_all >=2.0.0.0,<2.1-dev -> satisfiable by metamodels/bundle_all[2.0.0]. 

Kann mir jemand sagen, was ich da falsch mache?

Danke
Preetz

[xtra]

Stelle minimum stability auf alpha.