Your requirements could not be resolved to an installable set of packages. Problem 1 - Conclusion: don't install phpunit/phpunit[11.2.3] | install one of phpunit/php-code-coverage[11.0.0, 11.0.5], sebastian/complexity[4.0.1] (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.0.0 (conflict analysis result) - Conclusion: don't install nikic/php-parser v4.17.0 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.5.2 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.5.0 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.4.4 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.4.2 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.3.6 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.3.5 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.3.2 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.3.1 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.2.7 (conflict analysis result) - Conclusion: don't install phpunit/phpunit 11.2.3 (conflict analysis result) - Root composer.json requires vimeo/psalm ^5.26 -> satisfiable by vimeo/psalm[5.26.0, 5.26.1, 5.x-dev]. - You can only install one version of a package, so only one of these can be installed: nikic/php-parser[v4.0.0alpha1, ..., 4.x-dev, v5.0.0alpha1, ..., v5.4.0]. - phpunit/php-code-coverage 11.0.x-dev requires nikic/php-parser ^5.4.0 -> satisfiable by nikic/php-parser[v5.4.0]. - phpunit/phpunit[11.5.3, ..., 11.5.x-dev] require phpunit/php-code-coverage ^11.0.8 -> satisfiable by phpunit/php-code-coverage[11.0.8, 11.0.x-dev]. - Conclusion: don't install phpunit/php-code-coverage 11.0.8 (conflict analysis result) - Root composer.json requires phpunit/phpunit ^11.0.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.5.x-dev]. - vimeo/psalm 5.26.0 requires nikic/php-parser ^4.17 -> satisfiable by nikic/php-parser[v4.17.0, ..., 4.x-dev]. - Conclusion: install one of vimeo/psalm[5.26.0], nikic/php-parser[v4.17.1, v4.19.0] (conflict analysis result) Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.