$ /usr/bin/wp package install wp-cli/find-command --allow-root
Installing package wp-cli/find-command (dev-main || dev-master || dev-trunk)
Updating /root/.wp-cli/packages/composer.json to require the package...
Using Composer to install the package...
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Loading composer repositories with package information
Updating dependencies
Generating rules
Resolving dependencies through SAT
Looking at all rules.

Dependency resolution completed in 0.000 seconds
Your requirements could not be resolved to an installable set of packages.
Problem 1
    - Root composer.json requires wp-cli/find-command dev-main || dev-master || dev-trunk -> satisfiable by wp-cli/find-command[dev-main].
    - wp-cli/find-command dev-main requires wp-cli/wp-cli ^2.12 -> found wp-cli/wp-cli[2.11.0] but it does not match the constraint. See https://getcomposer.org/dep-on-root for details and assistance.
Running update with --no-dev does not mean require-dev is ignored, it just means the packages will not be installed. If dev requirements are blocking the update you have to resolve those problems.
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Error: Package installation failed (Composer return code 2).
Reverted composer.json.