Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires next/routing ^0.2, found next/routing[dev-master, 0.1, 0.1.1, 0.1.x-dev (alias of dev-master)] but it does not match the constraint. Problem 2 - Root composer.json requires next/utils ^0.2, found next/utils[dev-master, 0.1, 0.1.1, 0.1.x-dev (alias of dev-master)] but it does not match the constraint.