Delombok fails: module not found

[dtrunk90]

Trying to build my project with following module-info.java:

module example {
    exports com.acme.example;

    requires static com.ibm.icu;
    requires static lombok;
}

plugins {
    alias(libs.plugins.lombok)
}

java {
    registerFeature('transliterator') {
        usingSourceSet sourceSets.main
    }
}

dependencies {
    transliteratorImplementation libs.icu4j
}

> Task :delombok
/home/danny/workspace/test/src/main/java/module-info.java:4: error: module not found: com.ibm.icu
    requires static com.ibm.icu;
                           ^
/home/danny/workspace/test/src/main/java/com/acme/example/Example.java:3: error: package com.ibm.icu.text is not visible
import com.ibm.icu.text.Transliterator;
                  ^
  (package com.ibm.icu.text is declared in the unnamed module, but module com.ibm.icu.text does not read it)

icu4j has no module-info.class but an Automatic-Module-Name attribute in its MANIFEST.MF. But I guess it's because the lib is not in the module path for :delombok, because the following works:

java -jar ~/Downloads/lombok.jar delombok --module-path ~/Downloads/icu4j-73.1.jar -d delombok src

With the following config at the end of my build file it seems to work but I'm not sure if this is the right way to solve this:

delombok {
    modulePath = sourceSets.main.compileClasspath
}