configurations.compile.attributes.attribute(usage, 'compile')
}

dependencies {
    compile files('test-lib.jar')
    compile project(':a')
    compile project(':b')
    compile 'org:test:1.0'
    registerTransform(VariantArtifactTransform) {
        from.attribute(usage, "compile")
        to.attribute(usage, "transformed")
    }
}

project(':a') {
    configurations {
        compile {

                }

                artifactTypes.getByName("jar") {
                    attributes.attribute(counted, false)
                }
            }

            dependencies {
                registerTransform(CounterTransform) {
                    from.attribute(counted, false).attribute(artifactType, "jar")
                    to.attribute(counted, true).attribute(artifactType, "jar")
                }
            }

Migrate your artifact transform to use `TransformAction` and use link:{groovyDslPath}/org.gradle.api.artifacts.dsl.DependencyHandler.html#org.gradle.api.artifacts.dsl.DependencyHandler:registerTransform(java.lang.Class,%20org.gradle.api.Action)[DependencyHandler.registerTransform(Class, Action)] instead.