diff --git a/pkgs/development/compilers/rustc/1.0.0-alpha.nix b/pkgs/development/compilers/rustc/1.0.0-alpha.nix
index 9cbe3fec2c40..e0a68844d7f6 100644
--- a/pkgs/development/compilers/rustc/1.0.0-alpha.nix
+++ b/pkgs/development/compilers/rustc/1.0.0-alpha.nix
@@ -1,4 +1,6 @@
-{stdenv, fetchurl, which, file, perl, curl, python27, makeWrapper}:
+{stdenv, fetchurl, which, file, perl, curl, python27, makeWrapper
+, tzdata, git, valgrind, procps, coreutils
+}:
 
 assert !stdenv.isFreeBSD;
 
@@ -16,19 +18,19 @@ assert !stdenv.isFreeBSD;
 
 */
 
-with ((import ./common.nix) {inherit stdenv; version = "0.12.0"; });
+with ((import ./common.nix) {inherit stdenv; version = "1.0.0-alpha"; });
 
 let snapshotHash = if stdenv.system == "i686-linux"
-      then "555aca74f9a268f80cab2df1147dc6406403e9e4"
+      then "d8b73fc9aa3ad72ce1408a41e35d78dba10eb4d4"
       else if stdenv.system == "x86_64-linux"
-      then "6a43c2f6c8ba2cbbcb9da1f7b58f748aef99f431"
+      then "697880d3640e981bbbf23284363e8e9a158b588d"
       else if stdenv.system == "i686-darwin"
-      then "331bd7ef519cbb424188c546273e8c7d738f0894"
+      then "a73b1fc03e8cac747aab0aa186292bb4332a7a98"
       else if stdenv.system == "x86_64-darwin"
-      then "2c83a79a9febfe1d326acb17c3af76ba053c6ca9"
+      then "e4ae2670ea4ba5c2e5b4245409c9cab45c9eeb5b"
       else abort "no-snapshot for platform ${stdenv.system}";
-    snapshotDate = "2014-10-04";
-    snapshotRev = "749ff5e";
+    snapshotDate = "2015-01-07";
+    snapshotRev = "9e4e524";
     snapshotName = "rust-stage0-${snapshotDate}-${snapshotRev}-${platform}-${snapshotHash}.tar.bz2";
 
 in stdenv.mkDerivation {
@@ -37,8 +39,8 @@ in stdenv.mkDerivation {
   inherit meta;
 
   src = fetchurl {
-    url = "http://static.rust-lang.org/dist/rust-${version}.tar.gz";
-    sha256 = "1dv9wxh41230zknbwj34zgjnh1kgvvy6k12kbiy9bnch9nr6cgl8";
+    url = "http://static.rust-lang.org/dist/rustc-${version}-src.tar.gz";
+    sha256 = "0p62gx3s087n09d2v3l9iyfx5cmsa1x91n4ysixcb7w3drr8a8is";
   };
 
   # We need rust to build rust. If we don't provide it, configure will try to download it.
@@ -63,14 +65,26 @@ in stdenv.mkDerivation {
                 ++ stdenv.lib.optional (stdenv.cc ? clang) "--enable-clang";
 
   # The compiler requires cc, so we patch the source to tell it where to find it
-  patches = [ ./hardcode_paths.patch ./local_stage0.patch ];
+  patches = [ ./hardcode_paths.patch ./local_stage0.patch ]
+            ++ stdenv.lib.optional stdenv.needsPax ./grsec.patch;
+
   postPatch = ''
-    substituteInPlace src/librustc/back/link.rs \
+    substituteInPlace src/librustc_trans/back/link.rs \
       --subst-var-by "ccPath" "${stdenv.cc}/bin/cc"
     substituteInPlace src/librustc_back/archive.rs \
       --subst-var-by "arPath" "${stdenv.cc.binutils}/bin/ar"
+
+    substituteInPlace src/rust-installer/gen-install-script.sh \
+      --replace /bin/echo "${coreutils}/bin/echo"
+    substituteInPlace src/rust-installer/gen-installer.sh \
+      --replace /bin/echo "${coreutils}/bin/echo"
   '';
 
-  buildInputs = [ which file perl curl python27 makeWrapper ];
-  enableParallelBuilding = true;
+  buildInputs = [ which file perl curl python27 makeWrapper git valgrind procps ];
+
+  enableParallelBuilding = false; # disabled due to rust-lang/rust#16305
+
+  preCheck = "export TZDIR=${tzdata}/share/zoneinfo";
+
+  doCheck = true;
 }
diff --git a/pkgs/development/compilers/rustc/grsec.patch b/pkgs/development/compilers/rustc/grsec.patch
new file mode 100644
index 000000000000..84582ab7d70f
--- /dev/null
+++ b/pkgs/development/compilers/rustc/grsec.patch
@@ -0,0 +1,16 @@
+diff --git a/src/test/run-make/relocation-model/Makefile b/src/test/run-make/relocation-model/Makefile
+index 2fcdd32..2d9ddb0 100644
+--- a/src/test/run-make/relocation-model/Makefile
++++ b/src/test/run-make/relocation-model/Makefile
+@@ -5,9 +5,11 @@ all:
+ 	$(call RUN,foo)
+ 
+ 	$(RUSTC) -C relocation-model=default foo.rs
++	paxctl -czexm $(TMPDIR)/foo
+ 	$(call RUN,foo)
+ 
+ 	$(RUSTC) -C relocation-model=static foo.rs
++	paxctl -czexm $(TMPDIR)/foo
+ 	$(call RUN,foo)
+ 
+ 	$(RUSTC) -C relocation-model=default --crate-type=dylib foo.rs
diff --git a/pkgs/development/compilers/rustc/hardcode_paths.patch b/pkgs/development/compilers/rustc/hardcode_paths.patch
index 8701cd3c9829..2a9cb09dcbd3 100644
--- a/pkgs/development/compilers/rustc/hardcode_paths.patch
+++ b/pkgs/development/compilers/rustc/hardcode_paths.patch
@@ -1,37 +1,28 @@
-diff --git a/src/librustc/back/link.rs b/src/librustc/back/link.rs
-index 1cc60fc..2e94b99 100644
---- a/src/librustc/back/link.rs
-+++ b/src/librustc/back/link.rs
-@@ -383,18 +383,9 @@ 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 {
--        Some(ref linker) => return linker.to_string(),
--        None => {}
-+        Some(ref linker) => linker.to_string(),
-+        None => "@ccPath@".to_string()
-     }
--
--    // In the future, FreeBSD will use clang as default compiler.
--    // It would be flexible to use cc (system's default C compiler)
--    // instead of hard-coded gcc.
--    // For Windows, there is no cc command, so we add a condition to make it use gcc.
--    match sess.targ_cfg.os {
--        abi::OsWindows => "gcc",
--        _ => "cc",
--    }.to_string()
- }
- 
- pub fn remove(sess: &Session, path: &Path) {
 diff --git a/src/librustc_back/archive.rs b/src/librustc_back/archive.rs
-index 060dda5..fecf76b 100644
+index 7ea192b..cd5d01b 100644
 --- a/src/librustc_back/archive.rs
 +++ b/src/librustc_back/archive.rs
-@@ -53,7 +53,7 @@ fn run_ar(handler: &ErrorHandler, maybe_ar_prog: &Option<String>,
+@@ -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 dacf620..815ce60 100644
+--- a/src/librustc_trans/back/link.rs
++++ b/src/librustc_trans/back/link.rs
+@@ -348,8 +348,8 @@ 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 {
+-        Some(ref linker) => return linker.to_string(),
+-        None => sess.target.target.options.linker.clone(),
++        Some(ref linker) => linker.to_string(),
++        None => "@ccPath@".to_string(),
+     }
+ }
+