diff --git a/RSTree.xcodeproj/project.pbxproj b/RSTree.xcodeproj/project.pbxproj
index 66bd847..d3d406d 100644
--- a/RSTree.xcodeproj/project.pbxproj
+++ b/RSTree.xcodeproj/project.pbxproj
@@ -239,7 +239,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "xcrun -sdk macosx swiftc -target x86_64-macosx10.11  buildscripts/VerifyNoBuildSettings.swift -o $CONFIGURATION_TEMP_DIR/VerifyNoBS\n$CONFIGURATION_TEMP_DIR/VerifyNoBS ${PROJECT_NAME}.xcodeproj/project.pbxproj\n";
+			shellScript = "if [ \"$ENABLE_PREVIEWS\" = \"YES\" ]; then exit 0; fi\n\nxcrun -sdk macosx swiftc -target x86_64-macosx10.11  buildscripts/VerifyNoBuildSettings.swift -o $CONFIGURATION_TEMP_DIR/VerifyNoBS\n$CONFIGURATION_TEMP_DIR/VerifyNoBS ${PROJECT_NAME}.xcodeproj/project.pbxproj\n";
 		};
 /* End PBXShellScriptBuildPhase section */