diff --git a/NetNewsWire.xcodeproj/project.pbxproj b/NetNewsWire.xcodeproj/project.pbxproj
index 4cdb13a9d..dbc9bcd58 100644
--- a/NetNewsWire.xcodeproj/project.pbxproj
+++ b/NetNewsWire.xcodeproj/project.pbxproj
@@ -3627,7 +3627,7 @@
 			);
 			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 = "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\n\nif [ $? -ne 0 ]\nthen\n   echo \"error: Build Setting were found in the project.pbxproj file.  Most likely you didn't intend to change this file and should revert it.\"\n   exit 1\nfi\n";
 		};
 		65ED406F235DEF6C0081F399 /* Run Script: Automated build numbers */ = {
 			isa = PBXShellScriptBuildPhase;
@@ -3659,7 +3659,7 @@
 			);
 			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 = "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\nif [ $? -ne 0 ]\nthen\n   echo \"error: Build Setting were found in the project.pbxproj file.  Most likely you didn't intend to change this file and should revert it.\"\n   exit 1\nfi\n";
 		};
 		8423E3E3220158E700C3795B /* Run Script: Code Sign Sparkle */ = {
 			isa = PBXShellScriptBuildPhase;
@@ -3709,7 +3709,7 @@
 			);
 			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 = "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\n\nif [ $? -ne 0 ]\nthen\n   echo \"error: Build Setting were found in the project.pbxproj file.  Most likely you didn't intend to change this file and should revert it.\"\n   exit 1\nfi\n";
 		};
 /* End PBXShellScriptBuildPhase section */