diff --git a/ext/mini_racer_extension/extconf.rb b/ext/mini_racer_extension/extconf.rb
index 90e5eba..0956379 100644
--- a/ext/mini_racer_extension/extconf.rb
+++ b/ext/mini_racer_extension/extconf.rb
@@ -34,8 +34,8 @@ LIBV8_COMPATIBILITY = '~> 5.0.71.35.0'
 #
 # Libv8.configure_makefile
 
-#NODE_PATH = "/home/sam/Source/libv8"
-NODE_PATH = "/Users/sam/Source/libv8"
+NODE_PATH = "/home/sam/Source/libv8"
+#NODE_PATH = "/Users/sam/Source/libv8"
 #
 NODE_LIBS = NODE_PATH + "/vendor/v8/out/x64.release"
 NODE_INCLUDE = NODE_PATH + "/vendor/v8/include"
diff --git a/ext/mini_racer_extension/mini_racer_extension.cc b/ext/mini_racer_extension/mini_racer_extension.cc
index 8f0956d..640ce31 100644
--- a/ext/mini_racer_extension/mini_racer_extension.cc
+++ b/ext/mini_racer_extension/mini_racer_extension.cc
@@ -304,7 +304,7 @@ static VALUE rb_context_eval_unsafe(VALUE self, VALUE str) {
 	    }
 	} else {
             VALUE rb_str = rb_funcall(ruby_exception, rb_intern("to_s"), 0);
-	    rb_raise(CLASS_OF(ruby_exception), RSTRING_PTR(rb_str));
+	    rb_raise(CLASS_OF(ruby_exception), "%s", RSTRING_PTR(rb_str));
 	}
     }
 
@@ -472,7 +472,6 @@ VALUE allocate_external_function(VALUE klass) {
     return Data_Wrap_Struct(klass, NULL, deallocate_external_function, (void*)self);
 }
 
-
 VALUE allocate(VALUE klass) {
     init_v8();