then:
        if (isRootBuild) {
            0 * environmentChangeTracker.systemPropertyLoaded(_)
        } else {
            1 * environmentChangeTracker.systemPropertyLoaded("userSystemProp", "userSystemValue", null)
            1 * environmentChangeTracker.systemPropertyLoaded("userSystemProp2", "userSystemValue2", null)
        }

        where:
        isRootBuild << [true, false]
    }

     * */
    void systemPropertyChanged(Object key, @Nullable Object value, @Nullable String consumer);

    /**
     * System properties loaded from included build/buildSrc gradle.properties
     * */
    void systemPropertyLoaded(Object key, @Nullable Object value, @Nullable Object oldValue);

    /**
     * System properties overridden by passing CLI argument
     * */
    void systemPropertyOverridden(Object key);

internal
class VintageEnvironmentChangeTracker : EnvironmentChangeTracker {

    override fun systemPropertyChanged(key: Any, value: Any?, consumer: String?) {}

    override fun systemPropertyLoaded(key: Any, value: Any?, oldValue: Any?) {}

    override fun systemPropertyOverridden(key: Any) {}

    override fun systemPropertyChanged(key: Any, value: Any?, consumer: String?) =
        mode.toTrackingMode().systemPropertyChanged(key, value, consumer)

    override fun systemPropertyLoaded(key: Any, value: Any?, oldValue: Any?) {
        mode.toTrackingMode().systemPropertyLoaded(key, value, oldValue)
    }

    override fun systemPropertyOverridden(key: Any) =
        mode.toTrackingMode().systemPropertyOverridden(key)

                String systemPropertyKey = key.substring(prefixLength);
                if (!gradleInternal.isRootBuild()) {
                    environmentChangeTracker.systemPropertyLoaded(systemPropertyKey, properties.get(key), System.getProperty(systemPropertyKey));
                }
                System.setProperty(systemPropertyKey, uncheckedNonnullCast(properties.get(key)));
            }
        }