diff --git a/pkgs/development/compilers/intel-graphics-compiler/default.nix b/pkgs/development/compilers/intel-graphics-compiler/default.nix
index 1c40d7fe516b..85332a946450 100644
--- a/pkgs/development/compilers/intel-graphics-compiler/default.nix
+++ b/pkgs/development/compilers/intel-graphics-compiler/default.nix
@@ -5,7 +5,8 @@
 , runCommandLocal
 , bison
 , flex
-, llvmPackages_8
+, llvmPackages_11
+, lld_11
 , opencl-clang
 , python3
 , spirv-llvm-translator
@@ -14,7 +15,13 @@
 }:
 
 let
-  llvmPkgs = llvmPackages_8 // {
+  vc_intrinsics_src = fetchFromGitHub {
+    owner = "intel";
+    repo = "vc-intrinsics";
+    rev = "e5ad7e02aa4aa21a3cd7b3e5d1f3ec9b95f58872";
+    sha256 = "Vg1mngwpIQ3Tik0GgRXPG22lE4sLEAEFch492G2aIXs=";
+  };
+  llvmPkgs = llvmPackages_11 // {
     inherit spirv-llvm-translator;
   };
   inherit (llvmPkgs) llvm;
@@ -24,18 +31,18 @@ in
 
 stdenv.mkDerivation rec {
   pname = "intel-graphics-compiler";
-  version = "1.0.4241";
+  version = "1.0.8744";
 
   src = fetchFromGitHub {
     owner = "intel";
     repo = "intel-graphics-compiler";
     rev = "igc-${version}";
-    sha256 = "1jp3c67ppl1x4pazr5nzy52615cpx0kyckaridhc0fsmrkgilyxq";
+    sha256 = "G5+dYD8uZDPkRyn1sgXsRngdq4NJndiCJCYTRXyUgTA=";
   };
 
   nativeBuildInputs = [ clang cmake bison flex python3 ];
 
-  buildInputs = [ clang opencl-clang spirv-llvm-translator llvm ];
+  buildInputs = [ clang opencl-clang spirv-llvm-translator llvm lld_11 ];
 
   strictDeps = true;
 
@@ -53,9 +60,12 @@ stdenv.mkDerivation rec {
     ln -s clang $out/clang-${versions.major (getVersion clang)}
     ln -s ${opencl-clang}/lib/* $out/
     ln -s ${lib.getLib libclang}/lib/clang/${getVersion clang}/include/opencl-c.h $out/
+    ln -s ${lib.getLib libclang}/lib/clang/${getVersion clang}/include/opencl-c-base.h $out/
   '';
 
   cmakeFlags = [
+    "-DVC_INTRINSICS_SRC=${vc_intrinsics_src}"
+    "-DINSTALL_SPIRVDLL=0"
     "-DCCLANG_BUILD_PREBUILDS=ON"
     "-DCCLANG_BUILD_PREBUILDS_DIR=${prebuilds}"
     "-DIGC_PREFERRED_LLVM_VERSION=${getVersion llvm}"
diff --git a/pkgs/development/compilers/spirv-llvm-translator/default.nix b/pkgs/development/compilers/spirv-llvm-translator/default.nix
index e4549a7d65d7..0dff7f0e1b09 100644
--- a/pkgs/development/compilers/spirv-llvm-translator/default.nix
+++ b/pkgs/development/compilers/spirv-llvm-translator/default.nix
@@ -2,29 +2,30 @@
 , fetchFromGitHub
 , cmake
 , pkg-config
-
 , lit
-, llvm_8
+, llvm_11
 }:
 
 stdenv.mkDerivation rec {
   pname = "SPIRV-LLVM-Translator";
-  version = "8.0.1-2";
+  version = "unstable-2021-06-13";
 
   src = fetchFromGitHub {
     owner = "KhronosGroup";
     repo = "SPIRV-LLVM-Translator";
-    rev = "v${version}";
-    sha256 = "0hxalc3fkliqs61hpr97phbm3qsx4b8vgnlg30aimzr6aas403r5";
+    rev = "c67e6f26a7285aa753598ef792593ac4a545adf9";
+    sha256 = "sha256-1s3lVNTQDl+pUvbzSMsp3cOUSm6I4DzqJxnLMeeE3F4=";
   };
 
-  nativeBuildInputs = [ pkg-config cmake llvm_8.dev ];
+  nativeBuildInputs = [ pkg-config cmake llvm_11.dev ];
 
-  buildInputs = [ llvm_8 ];
+  buildInputs = [ llvm_11 ];
 
   checkInputs = [ lit ];
 
-  cmakeFlags = [ "-DLLVM_INCLUDE_TESTS=ON" ];
+  cmakeFlags = [
+    "-DLLVM_INCLUDE_TESTS=ON"
+  ];
 
   # FIXME: CMake tries to run "/llvm-lit" which of course doesn't exist
   doCheck = false;
diff --git a/pkgs/development/libraries/opencl-clang/default.nix b/pkgs/development/libraries/opencl-clang/default.nix
index 48c681973d16..243dfa44d5b3 100644
--- a/pkgs/development/libraries/opencl-clang/default.nix
+++ b/pkgs/development/libraries/opencl-clang/default.nix
@@ -5,14 +5,14 @@
 , cmake
 , git
 
-, llvmPackages_8
+, llvmPackages_11
 , spirv-llvm-translator
 
 , buildWithPatches ? true
 }:
 
 let
-  llvmPkgs = llvmPackages_8 // {
+  llvmPkgs = llvmPackages_11 // {
     inherit spirv-llvm-translator;
   };
 
@@ -31,7 +31,8 @@ let
     });
 
   passthru = rec {
-
+    spirv-llvm-translator = llvmPkgs.spirv-llvm-translator;
+    llvm = addPatches "llvm" llvmPkgs.llvm;
     libclang = addPatches "clang" llvmPkgs.libclang;
 
     clang-unwrapped = libclang.out;
@@ -43,14 +44,21 @@ let
     patchesOut = stdenv.mkDerivation rec {
       pname = "opencl-clang-patches";
       inherit (library) version src patches;
+      # Clang patches assume the root is the llvm root dir
+      # but clang root in nixpkgs is the clang sub-directory
+      postPatch = ''
+        for filename in patches/clang/*.patch; do
+          substituteInPlace "$filename" \
+            --replace "a/clang/" "a/" \
+            --replace "b/clang/" "b/"
+        done
+      '';
+
       installPhase = ''
         [ -d patches ] && cp -r patches/ $out || mkdir $out
-        mkdir -p $out/clang $out/spirv
+        mkdir -p $out/clang $out/llvm
       '';
     };
-
-    spirv-llvm-translator = addPatches "spirv" llvmPkgs.spirv-llvm-translator;
-
   };
 
   library = let
@@ -59,15 +67,15 @@ let
   in
     stdenv.mkDerivation rec {
       pname = "opencl-clang";
-      version = "unstable-2019-08-16";
+      version = "unstable-2021-06-22";
 
       inherit passthru;
 
       src = fetchFromGitHub {
         owner = "intel";
         repo = "opencl-clang";
-        rev = "94af090661d7c953c516c97a25ed053c744a0737";
-        sha256 = "05cg89m62nqjqm705h7gpdz4jd4hiczg8944dcjsvaybrqv3hcm5";
+        rev = "fd68f64b33e67d58f6c36b9e25c31c1178a1962a";
+        sha256 = "sha256-q1YPBb/LY67iEuQx1fMUQD/I7OsNfobW3yNfJxLXx3E=";
       };
 
       patches = [
diff --git a/pkgs/os-specific/linux/intel-compute-runtime/default.nix b/pkgs/os-specific/linux/intel-compute-runtime/default.nix
index 980b1fad0dfb..1d1d5667fe98 100644
--- a/pkgs/os-specific/linux/intel-compute-runtime/default.nix
+++ b/pkgs/os-specific/linux/intel-compute-runtime/default.nix
@@ -11,13 +11,13 @@
 
 stdenv.mkDerivation rec {
   pname = "intel-compute-runtime";
-  version = "20.34.17727";
+  version = "21.42.21270";
 
   src = fetchFromGitHub {
     owner = "intel";
     repo = "compute-runtime";
     rev = version;
-    sha256 = "19scbbr6jf3yp2v7z8xyzzm01g44jym7xfkf1dz64d5nhvjw6ig5";
+    sha256 = "N9MsDcsL8kBWxfZjhukcxZiSJnXxqMgWF0etOhf2/AE=";
   };
 
   nativeBuildInputs = [ cmake pkg-config ];