diff --git a/sample-macruby/Sketch/Ruby Sketch.xcodeproj/project.pbxproj b/sample-macruby/Sketch/Ruby Sketch.xcodeproj/project.pbxproj
index 735d9775e..400ed6cf7 100755
--- a/sample-macruby/Sketch/Ruby Sketch.xcodeproj/project.pbxproj	
+++ b/sample-macruby/Sketch/Ruby Sketch.xcodeproj/project.pbxproj	
@@ -251,7 +251,11 @@
 			isa = PBXProject;
 			buildConfigurationList = C01FCF4E08A954540054247B /* Build configuration list for PBXProject "Ruby Sketch" */;
 			compatibilityVersion = "Xcode 3.0";
+			developmentRegion = English;
 			hasScannedForEncodings = 1;
+			knownRegions = (
+				en,
+			);
 			mainGroup = 29B97314FDCFA39411CA2CEA /* Ruby Sketch */;
 			projectDirPath = "";
 			projectRoot = "";
@@ -424,7 +428,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				PREBINDING = NO;
-				SDKROOT = "$(DEVELOPER_SDK_DIR)/MacOSX10.5.sdk";
+				SDKROOT = "";
 			};
 			name = Debug;
 		};
@@ -436,7 +440,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				PREBINDING = NO;
-				SDKROOT = "$(DEVELOPER_SDK_DIR)/MacOSX10.5.sdk";
+				SDKROOT = "";
 			};
 			name = Release;
 		};