Regression: Cannot access module properties in setupBuildEnvironment anymore

Accessing a module property in setupBuildEnvironment (and setupRunEnvironment) is not possible anymore. The example below used to work in Qbs 1.10 and before:

import qbs 1.0
Module {
    property int a: 42
    setupBuildEnvironment: {
        console.info(a)
    }
}

Now with Qbs 1.11.0 an Error running setupBuildEnvironment script for product 'prod': ReferenceError: Can't find variable: a is thrown in line 6 when trying to build

import qbs 1.0

Product {
    Depends { name: "mod" }
}