diff --git a/pkgs/development/compilers/rustc/head.nix b/pkgs/development/compilers/rustc/head.nix
index 99012ba6d94d..00e87f30e2cd 100644
--- a/pkgs/development/compilers/rustc/head.nix
+++ b/pkgs/development/compilers/rustc/head.nix
@@ -2,9 +2,9 @@
 callPackage ./makeRustcDerivation.nix {
   shortVersion = "1.0.0-dev";
   isRelease = false;
-  # src rev for master on 2015/04/13
-  srcRev = "0cf99c3e06e84d20d68da649c888d63c72f33971";
-  srcSha = "0brnzsbxmidjnmvi36sz582k3kw6wk813y2y837zpmyxg9fjah0l";
+  # src rev for master on 2015-04-15
+  srcRev = "a691f1eefea586f154700be6ee1b991158f82b7f";
+  srcSha = "1afypvxahhwhva9rssagm2q08wgidv6xcjrx85lqwzy6abyl1hsz";
   snapshotHashLinux686 = "1ef82402ed16f5a6d2f87a9a62eaa83170e249ec";
   snapshotHashLinux64 = "ef2154372e97a3cb687897d027fd51c8f2c5f349";
   snapshotHashDarwin686 = "0310b1a970f2da7e61770fd14dbbbdca3b518234";
diff --git a/pkgs/development/compilers/rustc/patches/head.patch b/pkgs/development/compilers/rustc/patches/head.patch
index 3cbf8717cd1d..cd2320e84dfe 100644
--- a/pkgs/development/compilers/rustc/patches/head.patch
+++ b/pkgs/development/compilers/rustc/patches/head.patch
@@ -15,7 +15,7 @@ index ca59b1c..65ee7bf 100755
  # do not fail if one of the above fails, as all we need is a working rustc!
  exit 0
 diff --git a/src/librustc_back/archive.rs b/src/librustc_back/archive.rs
-index ed44bf8..2b84627 100644
+index 9f5751c..c98828f 100644
 --- a/src/librustc_back/archive.rs
 +++ b/src/librustc_back/archive.rs
 @@ -57,7 +57,7 @@ fn run_ar(handler: &ErrorHandler, maybe_ar_prog: &Option<String>,
@@ -28,10 +28,10 @@ index ed44bf8..2b84627 100644
      let mut cmd = Command::new(ar);
  
 diff --git a/src/librustc_trans/back/link.rs b/src/librustc_trans/back/link.rs
-index 3087a8e..578448f 100644
+index ad77735..1764f71 100644
 --- a/src/librustc_trans/back/link.rs
 +++ b/src/librustc_trans/back/link.rs
-@@ -352,8 +352,8 @@ pub fn mangle_internal_name_by_path_and_seq(path: PathElems, flav: &str) -> Stri
+@@ -360,8 +360,8 @@ 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 {
@@ -41,3 +41,17 @@ index 3087a8e..578448f 100644
 +        None => "@ccPath@".to_string(),
      }
  }
+ 
+diff --git a/src/test/run-pass/issue-20797.rs b/src/test/run-pass/issue-20797.rs
+index 8b5e6f8..480ad79 100644
+--- a/src/test/run-pass/issue-20797.rs
++++ b/src/test/run-pass/issue-20797.rs
+@@ -97,7 +97,7 @@ impl<S: Strategy> Iterator for Subpaths<S> {
+ }
+ 
+ fn _foo() {
+-    let _walker: Subpaths<Recursive> = Subpaths::walk(&PathBuf::from("/home")).unwrap();
++    let _walker: Subpaths<Recursive> = Subpaths::walk(&PathBuf::from("/tmp")).unwrap();
+ }
+ 
+ fn main() {}