Installation is broken

[justafish]

Following our installation instructions or using the test script:

+ ddev composer require 'lullabot/drainpipe-dev @dev' --dev --with-all-dependencies
./composer.json has been updated
Running composer update lullabot/drainpipe-dev --with-all-dependencies
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - phpunit/phpunit[9.6.20, ..., 9.6.x-dev] require sebastian/diff ^4.0.6 -> found sebastian/diff[4.0.6, 4.0.x-dev] but these were not loaded, likely because it conflicts with another require.
    - lullabot/drainpipe-dev dev-main requires phpunit/phpunit ^9.6.20 -> satisfiable by phpunit/phpunit[9.6.20, 9.6.x-dev].
    - Root composer.json requires lullabot/drainpipe-dev @dev -> satisfiable by lullabot/drainpipe-dev[dev-main].


Installation failed, reverting ./composer.json and ./composer.lock to their original content.
Composer [require lullabot/drainpipe-dev @dev --dev --with-all-dependencies] failed, composer command failed: exit status 2. stderr=