Get Started doesn't work

[stephanvierkant]

I followed the Get Started instructions to try Sonata, but both sonata-project/sandbox:2.3.x-dev and sonata-project/sandbox:dev-2.4-develop couldn't be found:

composer create-project sonata-project/sandbox:2.3.x-dev

Creating a "sonata-project/sandbox:2.3.x-dev" project at "./sandbox"

[InvalidArgumentException]
Could not find package sonata-project/sandbox with version 2.3.x-dev.

Even changing stability to dev didn't work:

create-project sonata-project/sandbox --stability dev

Creating a "sonata-project/sandbox" project at "./sandbox"
Installing sonata-project/sandbox (2.2.x-dev 3b9aab6681034d91568eb3bb9ea1707ae1fb4777)
  - Downloading sonata-project/sandbox (2.2.x-dev 3b9aab6)
  - Installing sonata-project/sandbox (2.2.x-dev 3b9aab6): Extracting archive
Created project in /home/stephan/PhpstormProjects/temp/sandbox
Key extra is a duplicate in ./composer.json at line 96
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires doctrine/doctrine-migrations-bundle dev-master, found doctrine/doctrine-migrations-bundle[v1.0.0-beta1, ..., 1.3.x-dev, v2.0.0-alpha1, ..., 2.2.x-dev, 3.0.0-alpha.1, ..., 3.2.x-dev] but it does not match the constraint.
  Problem 2
    - Root composer.json requires doctrine/migrations dev-master, found doctrine/migrations[dev-2.3.x-merge-up-into-3.0.x_604df0099f2eb0.71772160, dev-3.0.x-merge-up-into-3.1.x_604df2cc413842.24922142, dev-3.1.x-merge-up-into-3.2.x_dkSBoQ4E, dev-3.1.x-merge-up-into-3.2.x_aqEYa1ab, dev-3.1.x-merge-up-into-3.2.x_60206519d61310.52296705, dev-3.1.x-into-3.2.x, v1.0-ALPHA1, ..., 1.8.x-dev, v2.0.0-alpha1, ..., 2.3.x-dev, 3.0.0-alpha1, ..., 3.3.x-dev] but it does not match the constraint.
  Problem 3
    - Root composer.json requires knplabs/knp-menu-bundle 1.1.x-dev, found knplabs/knp-menu-bundle[dev-master, v1.0.0, v1.1.0, v1.1.1, v1.1.2, v2.0.0-alpha1, ..., v2.3.0, v3.0.0, v3.1.0, 3.x-dev (alias of dev-master)] but it does not match the constraint.
  Problem 4
    - Root composer.json requires sonata-project/news-bundle 2.2.*@dev -> satisfiable by sonata-project/news-bundle[2.2.0].
    - sonata-project/news-bundle 2.2.0 requires knplabs/knp-menu-bundle 1.1.*@dev -> found knplabs/knp-menu-bundle[v1.1.0, v1.1.1, v1.1.2] but it conflicts with your root composer.json require (1.1.x-dev).
  Problem 5
    - Root composer.json requires simplethings/entity-audit-bundle dev-master -> satisfiable by simplethings/entity-audit-bundle[dev-master].
    - simplethings/entity-audit-bundle dev-master requires twig/twig ^2.6 || ^3.0 -> found twig/twig[v2.6.0, ..., v2.14.6, v3.0.0, ..., v3.3.2] but it conflicts with your root composer.json require (1.12.*).
  Problem 6
    - sonata-project/admin-bundle[2.2.2, ..., 2.2.9] require knplabs/knp-menu-bundle ~1.1 -> found knplabs/knp-menu-bundle[v1.1.0, v1.1.1, v1.1.2] but it conflicts with your root composer.json require (1.1.x-dev).
    - sonata-project/admin-bundle[2.2.10, ..., 2.2.13] require knplabs/knp-menu-bundle >=1.1.0,<3.0.0 -> found knplabs/knp-menu-bundle[v1.1.0, v1.1.1, v1.1.2, v2.0.0-alpha1, ..., v2.3.0] but it conflicts with your root composer.json require (1.1.x-dev).
    - Root composer.json requires sonata-project/admin-bundle >=2.2.2,<2.3 -> satisfiable by sonata-project/admin-bundle[2.2.2, ..., 2.2.13].

[VincentLanglet]

This project is abandoned