Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nettrine/fixtures ^0.8.0 -> satisfiable by nettrine/fixtures[v0.8.0]. - Root composer.json requires nettrine/orm ^0.9.0 -> satisfiable by nettrine/orm[v0.9.0]. - doctrine/orm[3.3.0, ..., 3.4.x-dev] require doctrine/lexer ^3 -> satisfiable by doctrine/lexer[3.0.0, 3.0.1, 3.0.x-dev, 3.1.x-dev]. - nettrine/fixtures v0.8.0 requires doctrine/orm ^3.3.0 -> satisfiable by doctrine/orm[3.3.0, 3.3.1, 3.3.x-dev, 3.4.x-dev]. - Conclusion: don't install doctrine/lexer 3.0.1 (conflict analysis result) Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

Process completed with exit code 2.

Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nettrine/fixtures ^0.8.0 -> satisfiable by nettrine/fixtures[v0.8.0]. - Root composer.json requires nettrine/orm ^0.9.0 -> satisfiable by nettrine/orm[v0.9.0]. - doctrine/orm[3.3.0, ..., 3.4.x-dev] require doctrine/lexer ^3 -> satisfiable by doctrine/lexer[3.0.0, 3.0.1, 3.0.x-dev, 3.1.x-dev]. - nettrine/fixtures v0.8.0 requires doctrine/orm ^3.3.0 -> satisfiable by doctrine/orm[3.3.0, 3.3.1, 3.3.x-dev, 3.4.x-dev]. - Conclusion: don't install doctrine/lexer 3.0.1 (conflict analysis result) Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.