$ composer require drupal/console:~1.0 --prefer-dist --optimize-autoloader
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - drupal/console 1.0.0-rc18 requires drupal/console-core 1.0.0-rc18 -> satisfiable by drupal/console-core[1.0.0-rc18].
    - Conclusion: don't install drupal/console-core 1.0.0-rc18
    - drupal/console 1.0.0-rc17 requires drupal/console-core 1.0.0-rc17 -> satisfiable by drupal/console-core[1.0.0-rc17].
    - Conclusion: don't install drupal/console-core 1.0.0-rc17
    - drupal/console 1.0.0-rc16 requires drupal/console-core 1.0.0-rc16 -> satisfiable by drupal/console-core[1.0.0-rc16].
    - Conclusion: don't install drupal/console-core 1.0.0-rc16
    - drupal/console 1.0.0-rc15 requires drupal/console-core 1.0.0-rc15 -> satisfiable by drupal/console-core[1.0.0-rc15].
    - Conclusion: don't install drupal/console-core 1.0.0-rc15
    - drupal/console 1.0.0-rc14 requires drupal/console-core 1.0.0-rc14 -> satisfiable by drupal/console-core[1.0.0-rc14].
    - Conclusion: don't install drupal/console-core 1.0.0-rc14
    - drupal/console 1.0.0-rc13 requires drupal/console-core 1.0.0-rc13 -> satisfiable by drupal/console-core[1.0.0-rc13].
    - Conclusion: don't install drupal/console-core 1.0.0-rc13
    - drupal/console 1.0.0-rc12 requires drupal/console-core 1.0.0-rc12 -> satisfiable by drupal/console-core[1.0.0-rc12].
    - Conclusion: don't install drupal/console-core 1.0.0-rc12
    - Installation request for symfony/console 3.2.6 -> satisfiable by symfony/console[v3.2.6].
    - Installation request for symfony/http-foundation 3.2.6 -> satisfiable by symfony/http-foundation[v3.2.6].
    - Conclusion: don't install drupal/console 1.0.0-rc11
    - drupal/console 1.0.0-alpha1 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-alpha2 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-beta1 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-beta2 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-beta3 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-beta4 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-beta5 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc1 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc10 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc2 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc3 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc4 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc5 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc6 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc7 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc8 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - drupal/console 1.0.0-rc9 requires symfony/http-foundation ~2.8 -> satisfiable by symfony/http-foundation[2.8.x-dev].
    - Conclusion: don't install symfony/http-foundation 2.8.x-dev
    - Installation request for drupal/console ~1.0 -> satisfiable by drupal/console[1.0.0-alpha1, 1.0.0-alpha2, 1.0.0-beta1, 1.0.0-beta2, 1.0.0-beta3, 1.0.0-beta4, 1.0.0-beta5, 1.0.0-rc1, 1.0.0-rc10, 1.0.0-rc11, 1.0.0-rc12, 1.0.0-rc13, 1.0.0-rc14, 1.0.0-rc15, 1.0.0-rc16, 1.0.0-rc17, 1.0.0-rc18, 1.0.0-rc2, 1.0.0-rc3, 1.0.0-rc4, 1.0.0-rc5, 1.0.0-rc6, 1.0.0-rc7, 1.0.0-rc8, 1.0.0-rc9].