# Package type "library" is not supported You might see the following message after running composer: ``` Reading /Users/svandragt/.composer/auth.json Reading /Users/svandragt/dev/_hm/siemens/milestones.local/vendor/composer/installed.json Reading /Users/svandragt/.composer/vendor/composer/installed.json Loading plugin OomphInc\ComposerInstallersExtender\Plugin_composer_tmp1 Package type "library" is not supported ``` This is a [bug in oomphinc/composer-installers-extender >1.1.2 <= 2.0](https://github.com/oomphinc/composer-installers-extender/issues/26) and can be fixed by downgrading to 1.1.2 ```shell # Pin version to 1.1.2 composer require oomphinc/composer-installers-extender 1.1.2 --no-update --no-plugins # Update the plugin composer update oomphinc/composer-installers-extender --no-plugins # Update dependencies composer update oomphinc/composer-installers-extender ```