Turn Adding an existing annotation into a qualifier. Don't forget to add META-INF/services/javax.enterprise.inject.spi.Extension to activate the extension

CacheContextExt.java

import org.cdisandbox.event.Qualified;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.Extension;

public class CacheContextExt implements Extension {
    
    public void addCacheContextAsQualifier(@Observes BeforeBeanDiscovery bbd) {
        bbd.addQualifier(CacheContext.class);
    }
}