Breakpoints not working with GroovyShell evaluate() - intellij-idea

Question

I'm trying to add breakpoints in IntelliJ to debug foo.groovy when used like this:
def binding = new Binding();
binding.lineList = [list1];
binding.count = 5;
def shell = new GroovyShell(binding);
def result = shell.evaluate(new File("../../not-src-main-groovy/foo.groovy"));
This compiles and runs fine, BUT IntellIj won't stop at my breakpoints.
On the other hand, if I place foo.groovy in src/main/groovy/com/... then IntellIJ DOES stop at my breakpoints, as suggested in this stackoverflow answer.
But unlike that post, foo.groovy does multiple import statements. Those statements reference code from a different github repo, cloned locally outside my project at ../../not-src-main-groovy.
I've tried changing IntelliJ > Project Structure > Modules > mymodule > Dependencies > + > JARS or Directories > "../../not-src-main-groovy" but IntelliJ doesn't stop at the breakpoints.
How can I configure IntelliJ to stop at foo.groovy breakpoints?

Answer 1

I found a solution. Because my project uses gradle, I added the following to build.gradle.
dependencies {
...
compile files("include-me/**")
...
}
That way, gradle will include the files in the classpath during the compilation phase, but not actually compile them, since they're not in here:
sourceSets {
main.groovy {
srcDirs = [ 'src/main/groovy']
}
}