- change your composer.json to require the
dev-d9_islandora
version of islandora, thedev-d9
branch of islandora_defaults, and thedev-d9
branch of openseadragon. - remove carapace and adaptivetheme
composer require drupal/core-dev:^9.1 --dev --update-with-dependencies --no-update
composer require drupal/core-recommended:^9.1 drupal/core-composer-scaffold:^9.1 drupal/core-project-message:^9.1 --update-with-dependencies --no-update
composer update
however that'll probably fail until we don't have hook_post_action, libraries, and carapace/adaptivetheme removed i also had to do