Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires roave/backward-compatibility-check * -> satisfiable by roave/backward-compatibility-check[1.0.0, ..., 1.1.1, 2.0.0, 2.1.0, 3.0.0, 4.0.0, ..., 4.4.0, 5.0.0, 6.0.0, ..., 6.4.0, 7.0.0, ..., 7.4.0, 8.0.0, ..., 8.17.0]. - Root composer.json requires roave/infection-static-analysis-plugin ^1.35 -> satisfiable by roave/infection-static-analysis-plugin[1.35.0, ..., 1.43.0]. - Root composer.json requires spatie/phpunit-watcher ^1.24 -> satisfiable by spatie/phpunit-watcher[1.24.0, ..., 1.24.4]. - spatie/phpunit-watcher 1.24.0 requires symfony/console ^6 | ^7.0.7 -> satisfiable by symfony/console[v6.0.0, ..., v6.4.31, v7.0.7, ..., v7.4.3]. - spatie/phpunit-watcher[1.24.1, ..., 1.24.4] require symfony/console ^6.0 || ^7.0.7 || ^8.0 -> satisfiable by symfony/console[v6.0.0, ..., v6.4.31, v7.0.7, ..., v7.4.3, v8.0.0, v8.0.1, v8.0.3]. - symfony/console[v7.0.0, ..., v7.4.3] require php >=8.2 -> your php version (8.1.34) does not satisfy that requirement. - symfony/console[v8.0.0, ..., v8.0.3] require php >=8.4 -> your php version (8.1.34) does not satisfy that requirement. - Conclusion: install symfony/console v5.4.47 (conflict analysis result) - You can only install one version of a package, so only one of these can be installed: symfony/console[v2.7.0, ..., v2.8.52, v3.0.0, ..., v3.4.47, v4.0.0, ..., v4.4.49, v5.0.0, ..., v5.4.47, v6.0.0, ..., v6.4.31, v7.0.0, ..., v7.4.3, v8.0.0, v8.0.1, v8.0.3].