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Issue #3366108: Fix installation not working on D10.0

Works with Drupal 10.0.x. Testing this merge request requires a couple of changes to the installation instructions.

  1. If you are not using the core/recommended project template, you may need to use the Drupal fork that locks Symfony to version 6.2.
  2. Add this Blueprints Demo fork as a repository to your project’s composer.json:
    "repositories": [
            "type": "vcs",
            "url": ""
  1. Use the following Composer command to install:
composer require 'drupal/schemadotorg_demo:3366108-not-installable-10.0.x-dev@dev' -W
  1. If any patches do not apply, try going to the merge requests and rebasing them.
Edited by Darren Oh

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