Drupal console will fail to install on a fresh Drupal 9

[LorenzoCoronati]

Drupal console will fail to install on a fresh Drupal 9, because of a dependency on an old version of symfony console.

When trying to install drupal console via composer, I got the following output:

composer -vv require drupal/console:^1.9.4
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Dependency resolution completed in 0.202 seconds
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - drupal/console 1.9.4 requires drupal/console-core 1.9.4 -> satisfiable by drupal/console-core[1.9.4].
    - Installation request for drupal/console ^1.9.4 -> satisfiable by drupal/console[1.9.4].
    - Conclusion: remove symfony/console v4.4.9
    - Conclusion: don't install symfony/console v4.4.9
    - drupal/console-core 1.9.4 requires symfony/event-dispatcher ~2.8|~3.0 -> satisfiable by symfony/event-dispatcher[2.8.x-dev, 3.0.x-dev, 3.1.x-dev, 3.2.x-dev, 3.3.x-dev, 3.4.x-dev, v2.8.0, v2.8.0-BETA1, v2.8.1, v2.8.10, v2.8.11, v2.8.12, v2.8.13, v2.8.14, v2.8.15, v2.8.16, v2.8.17, v2.8.18, v2.8.19, v2.8.2, v2.8.20, v2.8.21, v2.8.22, v2.8.23, v2.8.24, v2.8.25, v2.8.26, v2.8.27, v2.8.28, v2.8.29, v2.8.3, v2.8.30, v2.8.31, v2.8.32, v2.8.33, v2.8.34, v2.8.35, v2.8.36, v2.8.37, v2.8.38, v2.8.39, v2.8.4, v2.8.40, v2.8.41, v2.8.42, v2.8.43, v2.8.44, v2.8.45, v2.8.46, v2.8.47, v2.8.48, v2.8.49, v2.8.5, v2.8.50, v2.8.52, v2.8.6, v2.8.7, v2.8.8, v2.8.9, v3.0.0, v3.0.0-BETA1, v3.0.1, v3.0.2, v3.0.3, v3.0.4, v3.0.5, v3.0.6, v3.0.7, v3.0.8, v3.0.9, v3.1.0, v3.1.0-BETA1, v3.1.0-RC1, v3.1.1, v3.1.10, v3.1.2, v3.1.3, v3.1.4, v3.1.5, v3.1.6, v3.1.7, v3.1.8, v3.1.9, v3.2.0, v3.2.0-BETA1, v3.2.0-RC1, v3.2.0-RC2, v3.2.1, v3.2.10, v3.2.11, v3.2.12, v3.2.13, v3.2.14, v3.2.2, v3.2.3, v3.2.4, v3.2.5, v3.2.6, v3.2.7, v3.2.8, v3.2.9, v3.3.0, v3.3.0-BETA1, v3.3.0-RC1, v3.3.1, v3.3.10, v3.3.11, v3.3.12, v3.3.13, v3.3.14, v3.3.15, v3.3.16, v3.3.17, v3.3.18, v3.3.2, v3.3.3, v3.3.4, v3.3.5, v3.3.6, v3.3.7, v3.3.8, v3.3.9, v3.4.0, v3.4.0-BETA1, v3.4.0-BETA2, v3.4.0-BETA3, v3.4.0-BETA4, v3.4.0-RC1, v3.4.0-RC2, v3.4.1, v3.4.10, v3.4.11, v3.4.12, v3.4.13, v3.4.14, v3.4.15, v3.4.16, v3.4.17, v3.4.18, v3.4.19, v3.4.2, v3.4.20, v3.4.21, v3.4.22, v3.4.23, v3.4.24, v3.4.25, v3.4.26, v3.4.27, v3.4.28, v3.4.29, v3.4.3, v3.4.30, v3.4.31, v3.4.32, v3.4.33, v3.4.34, v3.4.35, v3.4.36, v3.4.37, v3.4.38, v3.4.39, v3.4.4, v3.4.40, v3.4.41, v3.4.42, v3.4.43, v3.4.5, v3.4.6, v3.4.7, v3.4.8, v3.4.9].
    - symfony/event-dispatcher 2.8.x-dev conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.0 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.0-BETA1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.10 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.11 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.12 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.13 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.14 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.15 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.16 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.17 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.18 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.19 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.20 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.21 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.22 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.23 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.24 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.25 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.26 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.27 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.28 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.29 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.30 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.31 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.32 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.33 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.34 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.35 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.36 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.37 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.38 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.39 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.40 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.41 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.42 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.43 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.44 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.45 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.46 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.47 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.48 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.49 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.5 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.50 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.52 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.6 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.7 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.8 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v2.8.9 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher 3.0.x-dev conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.0 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.0-BETA1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.5 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.6 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.7 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.8 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.0.9 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher 3.1.x-dev conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher 3.2.x-dev conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher 3.3.x-dev conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher 3.4.x-dev conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.0 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.0-BETA1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.0-RC1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.10 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.5 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.6 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.7 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.8 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.1.9 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.0 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.0-BETA1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.0-RC1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.0-RC2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.10 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.11 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.12 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.13 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.14 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.5 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.6 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.7 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.8 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.2.9 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.0 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.0-BETA1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.0-RC1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.10 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.11 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.12 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.13 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.14 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.15 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.16 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.17 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.18 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.5 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.6 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.7 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.8 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.3.9 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0-BETA1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0-BETA2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0-BETA3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0-BETA4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0-RC1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.0-RC2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.1 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.10 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.11 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.12 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.13 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.14 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.15 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.16 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.17 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.18 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.19 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.2 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.20 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.21 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.22 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.23 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.24 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.25 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.26 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.27 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.28 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.29 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.3 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.30 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.31 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.32 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.33 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.34 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.35 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.36 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.37 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.38 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.39 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.4 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.40 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.41 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.42 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.43 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.5 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.6 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.7 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.8 conflicts with symfony/console[v4.4.9].
    - symfony/event-dispatcher v3.4.9 conflicts with symfony/console[v4.4.9].
    - Installation request for symfony/console (locked at v4.4.9) -> satisfiable by symfony/console[v4.4.9].


Installation failed, reverting ./composer.json to its original content.
ERROR: Command 'composer' failed. Check its output for possible causes or suggestions on how to proceed or fix the issue.

Please update composer.json to allow symfony/console v.4+