diff --git a/pkgs/development/compilers/llvm/3.9/clang/default.nix b/pkgs/development/compilers/llvm/3.9/clang/default.nix
index 6eadb91141d9..e6c804c96b1f 100644
--- a/pkgs/development/compilers/llvm/3.9/clang/default.nix
+++ b/pkgs/development/compilers/llvm/3.9/clang/default.nix
@@ -6,7 +6,7 @@ let
     name = "clang-${version}";
 
     unpackPhase = ''
-      unpackFile ${fetch "cfe" "0a1x32rxrq4ln079xf58irg56gjdxcfgwa00ws4hqv9pv73sg5km"}
+      unpackFile ${fetch "cfe" "0qsyyb40iwifhhlx9a3drf8z6ni6zwyk3bvh0kx2gs6yjsxwxi76"}
       mv cfe-${version}.src clang
       sourceRoot=$PWD/clang
       unpackFile ${clang-tools-extra_src}
diff --git a/pkgs/development/compilers/llvm/3.9/default.nix b/pkgs/development/compilers/llvm/3.9/default.nix
index 49fdad931b69..a01e47efb753 100644
--- a/pkgs/development/compilers/llvm/3.9/default.nix
+++ b/pkgs/development/compilers/llvm/3.9/default.nix
@@ -2,7 +2,7 @@
 let
   callPackage = newScope (self // { inherit stdenv isl version fetch; });
 
-  version = "3.9.0";
+  version = "3.9.1";
 
   fetch = fetch_v version;
   fetch_v = ver: name: sha256: fetchurl {
@@ -10,8 +10,8 @@ let
     inherit sha256;
   };
 
-  compiler-rt_src = fetch "compiler-rt" "16m5g0hf8yg9npnw25j2a86g34nsvk9rsm3c84gbch2prm7j5rg0";
-  clang-tools-extra_src = fetch "clang-tools-extra" "052zg0h5vbmxnh2ikc743rw3649f112dfyn8hg39x6cfxi3fqyjv";
+  compiler-rt_src = fetch "compiler-rt" "16gc2gdmp5c800qvydrdhsp0bzb97s8wrakl6i8a4lgslnqnf2fk";
+  clang-tools-extra_src = fetch "clang-tools-extra" "0d9nh7j7brbh9avigcn69dlaihsl9p3cf9s45mw6fxzzvrdvd999";
 
   self = {
     llvm = callPackage ./llvm.nix {
diff --git a/pkgs/development/compilers/llvm/3.9/libc++/default.nix b/pkgs/development/compilers/llvm/3.9/libc++/default.nix
index 3b7caaa24bf5..7a53ffa0d8fc 100644
--- a/pkgs/development/compilers/llvm/3.9/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/3.9/libc++/default.nix
@@ -3,7 +3,7 @@
 stdenv.mkDerivation rec {
   name = "libc++-${version}";
 
-  src = fetch "libcxx" "01jvgwi9zd46bb1f93c561212bjzg02q2akacvsj4qsw6r8qvcyh";
+  src = fetch "libcxx" "0qbl3afl2p2h87p977lsqr5kykl6cgjpkzczs0g6a3pn53j1bri5";
 
   postUnpack = ''
     unpackFile ${libcxxabi.src}
diff --git a/pkgs/development/compilers/llvm/3.9/libc++abi.nix b/pkgs/development/compilers/llvm/3.9/libc++abi.nix
index 2baac6386a57..aff4205d6a96 100644
--- a/pkgs/development/compilers/llvm/3.9/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/3.9/libc++abi.nix
@@ -3,7 +3,7 @@
 stdenv.mkDerivation {
   name = "libc++abi-${version}";
 
-  src = fetch "libcxxabi" "06c05jlwfgm2q5xhy5wzmsi9bmfphzh22wpmbph84s452wksjdxh";
+  src = fetch "libcxxabi" "1qi9q06zanqm8awzq83810avmvi52air6gr9zfip8mbg5viqn3cj";
 
   buildInputs = [ cmake ] ++ stdenv.lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) libunwind;
 
diff --git a/pkgs/development/compilers/llvm/3.9/lldb.nix b/pkgs/development/compilers/llvm/3.9/lldb.nix
index 55c00eb07fcb..5d8878b3b06d 100644
--- a/pkgs/development/compilers/llvm/3.9/lldb.nix
+++ b/pkgs/development/compilers/llvm/3.9/lldb.nix
@@ -15,7 +15,7 @@
 stdenv.mkDerivation {
   name = "lldb-${version}";
 
-  src = fetch "lldb" "1113s6crh94hzk9h9lqrvng0lsy174ml2rq0r962ngqy843hwa31";
+  src = fetch "lldb" "1z30ljmcpp261bjng1i5k3bb9jkrs1cr97z04qs4s3zql6r12cvy";
 
   postUnpack = ''
     # Hack around broken standalone build as of 3.8
diff --git a/pkgs/development/compilers/llvm/3.9/llvm.nix b/pkgs/development/compilers/llvm/3.9/llvm.nix
index 8086f980bcf5..b64cf4fed5b0 100644
--- a/pkgs/development/compilers/llvm/3.9/llvm.nix
+++ b/pkgs/development/compilers/llvm/3.9/llvm.nix
@@ -19,7 +19,7 @@
 }:
 
 let
-  src = fetch "llvm" "0j49lkd5d7nnpdqzaybs2472bvcxyx0i4r3iccwf3kj2v9wk3iv6";
+  src = fetch "llvm" "1vi9sf7rx1q04wj479rsvxayb6z740iaz3qniwp266fgp5a07n8z";
   shlib = if stdenv.isDarwin then "dylib" else "so";
 
   # Used when creating a version-suffixed symlink of libLLVM.dylib