How do I install metamodel

I have read here
http://metamodels.readthedocs.io/en/...l/install.html

done this
$ composer require metamodels/bundle_all

but I got this

Code:

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Using version ^2.0 for metamodels/bundle_all
./composer.json has been updated
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/bundle_attributes 2.0.1 requires metamodels/attribute_combinedvalues ~2.0 -> satisfiable by metamodels/attribute_combinedvalues[2.0.0-alpha1, 2.1.x-dev, 2.0.x-dev] but these conflict with your requirements or minimum-stability.
    - metamodels/bundle_attributes 2.0.0 requires metamodels/attribute_combinedvalues ~2.0 -> satisfiable by metamodels/attribute_combinedvalues[2.0.0-alpha1, 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_attributes ~2.0 -> satisfiable by metamodels/bundle_attributes[2.0.0, 2.0.1].
    - Installation request for metamodels/bundle_all ^2.0 -> satisfiable by metamodels/bundle_all[2.0.0].


Installation failed, reverting ./composer.json to its original content.

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It should install right? Where is the pit?

You have to change your minimum stability to "dev", since some attributes are still tagged as alpha versions (even tough they are quite stable imho). You can edit your compose.json directly or change your settings via backend, go to "package management" -> "setttings". So your composer/composer.json (not the one in TL_ROOT) should look like this:

Code:

---

{
    "name": "local/website",
    "description": "A local website project",
    "type": "project",
    "license": "proprietary",
    "require": {
        "contao-community-alliance/composer-client": "~0.12",
        "metamodels/bundle_all": ">=2.0.0.0,<2.1-dev",
        ...
    },
    "prefer-stable": true,
    "minimum-stability": "dev",
    "config": {
        "preferred-install": "auto",
        "cache-dir": "cache",
        "component-dir": "../assets/components",
        "discard-changes": true
    },
    "repositories": [
        {
            "type": "composer",
            "url": "https://legacy-packages-via.contao-community-alliance.org/"
        },
        {
            "type": "artifact",
            "url": "packages"
        }
    ],
    "extra": {
        "contao": {
            "migrated": "done"
        }
    }
}

---

Thank you