Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires infection/infection ^0.27.11 -> satisfiable by infection/infection[0.27.11]. - infection/infection 0.27.11 requires symfony/process ^5.4 || ^6.0 || ^7.0 -> found symfony/process[v5.4.0, ..., v5.4.47, v6.0.0, ..., v6.4.26, v7.0.0, ..., v7.4.0] but it conflicts with your root composer.json require (^8.0.0). Problem 2 - Root composer.json requires symfony/process ^8.0.0 -> satisfiable by symfony/process[v8.0.0]. - symfony/process v8.0.0 requires php >=8.4 -> your php version (8.2.99; overridden via config.platform, actual: 8.3.28) does not satisfy that requirement. Problem 3 - Root composer.json requires composer/composer ^2.7.2 -> satisfiable by composer/composer[2.7.7, ..., 2.9.2]. - composer/composer 2.7.7 requires symfony/process ^5.4 || ^6.0 || ^7 -> found symfony/process[v5.4.0, ..., v5.4.47, v6.0.0, ..., v6.4.26, v7.0.0, ..., v7.4.0] but it conflicts with your root composer.json require (^8.0.0). - composer/composer[2.7.8, ..., 2.8.11] require symfony/process ^5.4.35 || ^6.3.12 || ^7.0.3 -> found symfony/process[v5.4.35, ..., v5.4.47, v6.3.12, ..., v6.4.26, v7.0.3, ..., v7.4.0] but it conflicts with your root composer.json require (^8.0.0). - composer/composer 2.8.12 requires symfony/process ^5.4.47 || ^6.4.25 || ^7.1.10 -> found symfony/process[v5.4.47, v6.4.25, v6.4.26, v7.2.0, ..., v7.4.0] but it conflicts with your root composer.json require (^8.0.0). - composer/composer[2.9.0, ..., 2.9.2] require symfony/process ^5.4.47 || ^6.4.25 || ^7.1.10 || ^8.0 -> satisfiable by symfony/process[v8.0.0]. - symfony/process v8.0.0 requires php >=8.4 -> your php version (8.2.99; overridden via config.platform, actual: 8.3.28) does not satisfy that requirement. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.