diff --git a/pkgs/development/compilers/rustc/hardcode_paths.HEAD.patch b/pkgs/development/compilers/rustc/hardcode_paths.HEAD.patch
index 83fb26e7a474..ee258e1d408c 100644
--- a/pkgs/development/compilers/rustc/hardcode_paths.HEAD.patch
+++ b/pkgs/development/compilers/rustc/hardcode_paths.HEAD.patch
@@ -1,21 +1,21 @@
 diff --git a/src/librustc_back/archive.rs b/src/librustc_back/archive.rs
-index a88bcaf..9c3858d 100644
+index 0bd4265..bbdab9b 100644
 --- a/src/librustc_back/archive.rs
 +++ b/src/librustc_back/archive.rs
 @@ -54,7 +54,7 @@ fn run_ar(handler: &ErrorHandler, maybe_ar_prog: &Option<String>,
            paths: &[&Path]) -> ProcessOutput {
      let ar = match *maybe_ar_prog {
-         Some(ref ar) => ar.as_slice(),
+         Some(ref ar) => ar[],
 -        None => "ar"
 +        None => "@arPath@"
      };
      let mut cmd = Command::new(ar);
  
 diff --git a/src/librustc_trans/back/link.rs b/src/librustc_trans/back/link.rs
-index d27a338..c9b1508 100644
+index ec61d3a..8252939 100644
 --- a/src/librustc_trans/back/link.rs
 +++ b/src/librustc_trans/back/link.rs
-@@ -361,8 +361,8 @@ pub fn mangle_internal_name_by_path_and_seq(path: PathElems, flav: &str) -> Stri
+@@ -346,8 +346,8 @@ pub fn mangle_internal_name_by_path_and_seq(path: PathElems, flav: &str) -> Stri
  
  pub fn get_cc_prog(sess: &Session) -> String {
      match sess.opts.cg.linker {
diff --git a/pkgs/development/compilers/rustc/head.nix b/pkgs/development/compilers/rustc/head.nix
index 20c21bec06f9..f71236c50051 100644
--- a/pkgs/development/compilers/rustc/head.nix
+++ b/pkgs/development/compilers/rustc/head.nix
@@ -16,7 +16,7 @@
 
 */
 
-with ((import ./common.nix) {inherit stdenv; version = "0.13.0-pre-2604-g2f3cff6";});
+with ((import ./common.nix) {inherit stdenv; version = "0.13.0-pre-2763-g6366631";});
 
 let snapshot = if stdenv.system == "i686-linux"
       then "3daf531aed03f5769402f2fef852377e2838db98"
@@ -38,8 +38,8 @@ in stdenv.mkDerivation {
 
   src = fetchgit {
     url = https://github.com/rust-lang/rust;
-    rev = "2f3cff6956d56048ef7afb6d33e17cbdb2dcf038";
-    sha256 = "113y74sd1gr7f0xs1lsgjw3jkvhz8s4dxx34r9cxlw5vjr7fp066";
+    rev = "63666317214788329e0b7680929b09823f127d83";
+    sha256 = "1saf6ycy5dzp1bxypzqisi4g4p0y1czbgr82xbrw5c81x5c274zk";
   };
 
   # We need rust to build rust. If we don't provide it, configure will try to download it.