class Gem::Resolver

def requirement_satisfied_by?(requirement, activated, spec)
  matches_spec = requirement.matches_spec? spec
  return matches_spec if @soft_missing
  matches_spec &&
    spec.spec.required_ruby_version.satisfied_by?(Gem.ruby_version) &&
    spec.spec.required_rubygems_version.satisfied_by?(Gem.rubygems_version)
end