diff --git a/pkgs/development/compilers/rustc/head.nix b/pkgs/development/compilers/rustc/head.nix
index 2e890f2fb76..9d415eed0b4 100644
--- a/pkgs/development/compilers/rustc/head.nix
+++ b/pkgs/development/compilers/rustc/head.nix
@@ -1,16 +1,16 @@
 { stdenv, callPackage }:
 callPackage ./generic.nix {
-  shortVersion = "2015-07-01";
+  shortVersion = "2015-07-28";
   isRelease = false;
-  # src rev for master on 2015-07-01
-  srcRev = "bf3c979ec";
-  srcSha = "1xp2fjffz5bwxfs37w80bdhy9lv091ps7xbnsvxid2i91rbxfrkk";
-  snapshotHashLinux686 = "a6f22e481eabf098cc65bda97bf7e434a1fcc20b";
-  snapshotHashLinux64 = "5fd8698fdfe953e6c4d86cf4fa1d5f3a0053248c";
-  snapshotHashDarwin686 = "9a273324a6b63a40f67a553029c0a9fb692ffd1f";
-  snapshotHashDarwin64 = "e5b12cb7c179fc98fa905a3c84803645d946a6ae";
-  snapshotDate = "2015-05-24";
-  snapshotRev = "ba0e1cd";
+  # src rev for 2015-07-28's nightly channel
+  srcRev = "8b835572b";
+  srcSha = "1qrw0vszr1zipsbp7gcm8kik73d2bfxwv6mniv81ygn9i7v76wfz";
+  snapshotHashLinux686 = "93f6216a35d3bed3cedf244c9aff4cd716336bd9";
+  snapshotHashLinux64 = "d8f4967fc71a153c925faecf95a7feadf7e463a4";
+  snapshotHashDarwin686 = "29852c4d4b5a851f16d627856a279cae5bf9bd01";
+  snapshotHashDarwin64 = "1a20259899321062a0325edb1d22990f05d18708";
+  snapshotDate = "2015-07-17";
+  snapshotRev = "d4432b3";
   patches = [
     ./patches/head.patch
   ] ++ stdenv.lib.optional stdenv.needsPax ./patches/grsec.patch;
diff --git a/pkgs/development/compilers/rustc/patches/head.patch b/pkgs/development/compilers/rustc/patches/head.patch
index d7bede68682..ace22c825f9 100644
--- a/pkgs/development/compilers/rustc/patches/head.patch
+++ b/pkgs/development/compilers/rustc/patches/head.patch
@@ -1,11 +1,11 @@
 diff --git a/src/librustc_back/target/mod.rs b/src/librustc_back/target/mod.rs
-index a42f861..bda4bde 100644
+index 39e4291..b352bd1 100644
 --- a/src/librustc_back/target/mod.rs
 +++ b/src/librustc_back/target/mod.rs
-@@ -172,8 +172,8 @@ impl Default for TargetOptions {
-     /// incomplete, and if used for compilation, will certainly not work.
+@@ -179,8 +179,8 @@ impl Default for TargetOptions {
      fn default() -> TargetOptions {
          TargetOptions {
+             data_layout: String::new(),
 -            linker: "cc".to_string(),
 -            ar: "ar".to_string(),
 +            linker: "@ccPath@".to_string(), // ignore-tidy-linelength