Use Sonatype Snapshots repo only when the current version is a snapshot

build.gradle

@@ -17,11 +17,13 @@ project.targetCompatibility = '1.7'
 
 repositories {
 	mavenCentral()
+	if (isSnapshot) {
 		maven {
 			name "sonatype snapshots"
 			url "https://oss.sonatype.org/content/repositories/snapshots"
 		}
 	}
+}
 
 configurations.all {
 	resolutionStrategy.cacheChangingModulesFor 0, 'seconds'