Fix task dependency for collectScreenshots

build.gradle

@@ -129,10 +129,11 @@ allprojects {
 
 }
 
-task collectScreenshots(dependsOn: 'classes') {
+
+task collectScreenshots {
     doFirst {
-        for (sub in project.subprojects) {
-            if (sub.sourceSets.hasProperty("demo")) {
+        def demoProjects = project.subprojects.findAll { it.sourceSets.hasProperty("demo") }
+        for (sub in demoProjects) {
             def set = sub.sourceSets.demo
             def ucl = new URLClassLoader(set.runtimeClasspath.collect { it.toURI().toURL() } as URL[])
             for (x in set.output) {
@@ -159,5 +160,7 @@ task collectScreenshots(dependsOn: 'classes') {
             }
         }
     }
-    }
+}
+collectScreenshots.dependsOn {
+    project.subprojects.findAll { it.sourceSets.hasProperty("demo") }.collect { it.tasks.demoClasses }
 }