"composer" package does not work after installation with zb

[shadowhand]

Fatal error: Uncaught PharException: phar "/opt/zerobrew/Cellar/composer/2.10.1/bin/composer" SHA512 signature could not be verified: broken signature in /opt/zerobrew/Cellar/composer/2.10.1/bin/composer:28
Stack trace:
#0 /opt/zerobrew/Cellar/composer/2.10.1/bin/composer(28): Phar::mapPhar('composer.phar')
#1 {main}
  thrown in /opt/zerobrew/Cellar/composer/2.10.1/bin/composer on line 28

Unsure why this happens but it happens consistently after running zb install composer. Using the manual installation method works fine.