sed -i -s 's/#\[deriving(/#\[derive(/g' **/*.rs

src/libstd/num/mod.rs

@@ -727,7 +727,7 @@ mod tests {
     test_checked_next_power_of_two! { test_checked_next_power_of_two_u64, u64 }
     test_checked_next_power_of_two! { test_checked_next_power_of_two_uint, uint }
 
-    #[deriving(PartialEq, Show)]
+    #[derive(PartialEq, Show)]
     struct Value { x: int }
 
     impl ToPrimitive for Value {

src/libstd/num/strconv.rs

@@ -26,7 +26,7 @@ use string::String;
 use vec::Vec;
 
 /// A flag that specifies whether to use exponential (scientific) notation.
-#[deriving(Copy)]
+#[derive(Copy)]
 pub enum ExponentFormat {
     /// Do not use exponential notation.
     ExpNone,
@@ -41,7 +41,7 @@ pub enum ExponentFormat {
 
 /// The number of digits used for emitting the fractional part of a number, if
 /// any.
-#[deriving(Copy)]
+#[derive(Copy)]
 pub enum SignificantDigits {
     /// All calculable digits will be printed.
     ///
@@ -58,7 +58,7 @@ pub enum SignificantDigits {
 }
 
 /// How to emit the sign of a number.
-#[deriving(Copy)]
+#[derive(Copy)]
 pub enum SignFormat {
     /// No sign will be printed. The exponent sign will also be emitted.
     SignNone,