diff --git a/pkgs/development/compilers/llvm/11/clang/default.nix b/pkgs/development/compilers/llvm/11/clang/default.nix
index 08f9339dc8e5..ad0aea0db701 100644
--- a/pkgs/development/compilers/llvm/11/clang/default.nix
+++ b/pkgs/development/compilers/llvm/11/clang/default.nix
@@ -8,7 +8,7 @@ let
     pname = "clang";
     inherit version;
 
-    src = fetch "clang" "18rv5nxk04fgk4ziix7z4s2cargdpqgvqrk3lnp3wvd6yb5g5p98";
+    src = fetch "clang" "00wx4vn9pgans1kqdbii2rl8dlx6nwdgvh27imzc06qxl364fywd";
 
     unpackPhase = ''
       unpackFile $src
diff --git a/pkgs/development/compilers/llvm/11/compiler-rt.nix b/pkgs/development/compilers/llvm/11/compiler-rt.nix
index 133db3659424..15e6d77c71a3 100644
--- a/pkgs/development/compilers/llvm/11/compiler-rt.nix
+++ b/pkgs/development/compilers/llvm/11/compiler-rt.nix
@@ -11,7 +11,7 @@ in
 stdenv.mkDerivation rec {
   pname = "compiler-rt";
   inherit version;
-  src = fetch pname "0qfgap6acxffm01hzk38pmzq8ac3isk90531dz0qf7fd5015jvvg";
+  src = fetch pname "0k98q454hv8ngnan496dh8pj0l8nlxdc0zdv9xpsh9r7way15la9";
 
   nativeBuildInputs = [ cmake python3 llvm ];
   buildInputs = stdenv.lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
diff --git a/pkgs/development/compilers/llvm/11/default.nix b/pkgs/development/compilers/llvm/11/default.nix
index cbb3df9f687e..e0b473043ab9 100644
--- a/pkgs/development/compilers/llvm/11/default.nix
+++ b/pkgs/development/compilers/llvm/11/default.nix
@@ -6,7 +6,7 @@
 
 let
   release_version = "11.0.0";
-  candidate = "rc2";
+  candidate = "rc3";
   version = "${release_version}${candidate}"; # differentiating these (variables) is important for RCs
   targetConfig = stdenv.targetPlatform.config;
 
@@ -15,7 +15,7 @@ let
     inherit sha256;
   };
 
-  clang-tools-extra_src = fetch "clang-tools-extra" "0bg2a9nmkdbj5qfd0vvqj8bgchcx1yzmylxxgvh8y5hhj4fz13fs";
+  clang-tools-extra_src = fetch "clang-tools-extra" "0qmqzdiiq0prkn6gzzzhijjvmnj7n1h0y49lbw6c97l11frhishm";
 
   tools = stdenv.lib.makeExtensible (tools: let
     callPackage = newScope (tools // { inherit stdenv cmake libxml2 python3 isl release_version version fetch; });
diff --git a/pkgs/development/compilers/llvm/11/libc++/default.nix b/pkgs/development/compilers/llvm/11/libc++/default.nix
index a2ea7e299185..e8ade7dda464 100644
--- a/pkgs/development/compilers/llvm/11/libc++/default.nix
+++ b/pkgs/development/compilers/llvm/11/libc++/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
   pname = "libc++";
   inherit version;
 
-  src = fetch "libcxx" "0aaci7iblfczv1jb22zjrwzxcrcx6x7klvjivmxm2zni0n2x3bd4";
+  src = fetch "libcxx" "19lzg6n9vzcl9sk9xn2gbfnl4dzlhmxrm1d19ira1206xlmg39r7";
 
   postUnpack = ''
     unpackFile ${libcxxabi.src}
diff --git a/pkgs/development/compilers/llvm/11/libc++abi.nix b/pkgs/development/compilers/llvm/11/libc++abi.nix
index bf7b3fd001d5..62e45a89982d 100644
--- a/pkgs/development/compilers/llvm/11/libc++abi.nix
+++ b/pkgs/development/compilers/llvm/11/libc++abi.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation {
   pname = "libc++abi";
   inherit version;
 
-  src = fetch "libcxxabi" "04gqdzs13sw7f7a06h5zm5917d9f1k79l4rcm096grgvf0r7lnqx";
+  src = fetch "libcxxabi" "01m66bbx2r8mzbg1k2dk4wrma7rsm668h02drh0v1zcp943bx4ig";
 
   nativeBuildInputs = [ cmake ];
   buildInputs = stdenv.lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm) libunwind;
diff --git a/pkgs/development/compilers/llvm/11/libunwind.nix b/pkgs/development/compilers/llvm/11/libunwind.nix
index 03b58ca8d1d3..6e8c7647dca3 100644
--- a/pkgs/development/compilers/llvm/11/libunwind.nix
+++ b/pkgs/development/compilers/llvm/11/libunwind.nix
@@ -4,7 +4,7 @@ stdenv.mkDerivation rec {
   pname = "libunwind";
   inherit version;
 
-  src = fetch pname "1ch4a2yp821lgzxh9898f7nw2fnkrn3wh25sqg05hlks45znv30y";
+  src = fetch pname "1cs0bygglc70aadzhnackd0mamc16y01z2yxv9jglxd0r78gk0ff";
 
   nativeBuildInputs = [ cmake ];
 
diff --git a/pkgs/development/compilers/llvm/11/lld.nix b/pkgs/development/compilers/llvm/11/lld.nix
index 74d18a444fc2..750a2297f055 100644
--- a/pkgs/development/compilers/llvm/11/lld.nix
+++ b/pkgs/development/compilers/llvm/11/lld.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   pname = "lld";
   inherit version;
 
-  src = fetch pname "0lqz5cfids0rrl02p0qq5s18p8ikaa9r5gwa2yvj3bismdhvmar8";
+  src = fetch pname "0d77y8nr69bhxhy719ynl52j5h3pjzm31lhyx5f9cpflqk80m5f8";
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ llvm libxml2 ];
diff --git a/pkgs/development/compilers/llvm/11/lldb.nix b/pkgs/development/compilers/llvm/11/lldb.nix
index c0b7f267f750..2d865460342a 100644
--- a/pkgs/development/compilers/llvm/11/lldb.nix
+++ b/pkgs/development/compilers/llvm/11/lldb.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation (rec {
   pname = "lldb";
   inherit version;
 
-  src = fetch pname "0hb582kvhxp3kcckz7imrihs0kszdaz09z22xfymyi4vgmcy62q3";
+  src = fetch pname "0j56f7nr8awqpn4ynib6qi0riz1x7d4jsl2vhdlizz2fvyxvn5is";
 
   patches = [ ./lldb-procfs.patch ];
 
diff --git a/pkgs/development/compilers/llvm/11/llvm.nix b/pkgs/development/compilers/llvm/11/llvm.nix
index f15a7d12b807..aed0f08608f3 100644
--- a/pkgs/development/compilers/llvm/11/llvm.nix
+++ b/pkgs/development/compilers/llvm/11/llvm.nix
@@ -32,8 +32,8 @@ in stdenv.mkDerivation (rec {
   pname = "llvm";
   inherit version;
 
-  src = fetch pname "151c7nphn18dcw04yxyp6qdj8w19psb8nigf26djf7rhpi1fn0sh";
-  polly_src = fetch "polly" "0caxfpaxhf38nam4gkb9xqlrw20v29cm8jf95ykkbngqw64rmgij";
+  src = fetch pname "1f9ix9kvpr2nxwqbr73cwqvn9wsm5wlnza0hyji7z7pac8d2dxl6";
+  polly_src = fetch "polly" "18ysra81fsyfcldydg0lxnwjhpd3kwxfdzvfx24dmgrykpbcqbi6";
 
   unpackPhase = ''
     unpackFile $src