diff --git a/pkgs/development/libraries/beignet/default.nix b/pkgs/development/libraries/beignet/default.nix
index 5d5c834b4acf..7f127522f058 100644
--- a/pkgs/development/libraries/beignet/default.nix
+++ b/pkgs/development/libraries/beignet/default.nix
@@ -6,111 +6,99 @@
 , llvm
 , libdrm
 , libX11
-, libXfixes
 , libpthreadstubs
 , libXdmcp
 , libXdamage
-, libXxf86vm
-, python
-, gl
+, libXext
+, python3
 , ocl-icd
+, mesa_noglu
+, makeWrapper
+, beignet
 }: 
 
 stdenv.mkDerivation rec {
   name = "beignet-${version}";
-  version = "1.1.2"; 
+  version = "1.2.1";
 
   src = fetchurl {
     url = "https://01.org/sites/default/files/${name}-source.tar.gz"; 
-    sha256 = "6a8d875afbb5e3c4fc57da1ea80f79abadd9136bfd87ab1f83c02784659f1d96"; 
+    sha256 = "07y8ga545654jdbijmplga7a7j3jn04q5gfdjsl8cax16hsv0kmp";
   };  
 
   patches = [ ./clang_llvm.patch ]; 
 
+  enableParallelBuilding = true;
+
   postPatch = ''
-    patchShebangs src/git_sha1.sh; 
-
-    for f in $(find utests -type f)
-    do
-      sed -e "s@isnan(@std::isnan(@g" -i $f
-      sed -e "s@_std::isnan@_isnan@g" -i $f
-
-      sed -e "s@isinf(@std::isinf(@g" -i $f
-      sed -e "s@_std::isinf@_isinf@g" -i $f
-    done
+    patchShebangs src/git_sha1.sh
   ''; 
 
-  configurePhase = ''
-    cmake . -DCMAKE_INSTALL_PREFIX=$out \
-            -DCLANG_LIBRARY_DIR="${clang-unwrapped}/lib" \
-            -DLLVM_INSTALL_DIR="${llvm}/bin" \
-            -DCLANG_INSTALL_DIR="${clang-unwrapped}/bin"
-  '';
-
-  postInstall = ''
-    mkdir -p $out/utests/kernels
-    mkdir -p $out/utests/lib
-
-    cp -r kernels $out/utests
-    cp src/libcl.so $out/utests/lib
-
-    cat > $out/utests/setenv.sh << EOF
-#!/bin/sh
-export OCL_BITCODE_LIB_PATH=$out/lib/beignet/beignet.bc
-export OCL_HEADER_FILE_DIR=$out/lib/beignet/include
-export OCL_PCH_PATH=$out/lib/beignet/beignet.pch
-export OCL_GBE_PATH=$out/lib/beignet/libgbe.so
-export OCL_INTERP_PATH=$out/lib/beignet/libgbeinterp.so
-export OCL_KERNEL_PATH=$out/utests/kernels
-export OCL_IGNORE_SELF_TEST=1
-EOF
-
-    function fixRunPath {
-      p0=$(patchelf --print-rpath $1)
-      p1=$(echo $p0 | sed -e "s@$(pwd)/src@$out/utests/lib@g" -)
-      p2=$(echo $p1 | sed -e "s@$(pwd)/utests@$out/utests@g" -)
-      patchelf --set-rpath $p2 $1 
-    }
-    
-    fixRunPath utests/utest_run
-    fixRunPath utests/libutests.so
-
-    cp utests/utest_run $out/utests
-    cp utests/libutests.so $out/utests
-
-    mkdir -p $out/bin
-    ln -s $out/utests/setenv.sh $out/bin/beignet_setenv.sh
-    ln -s $out/utests/utest_run $out/bin/beignet_utest_run
-  ''; 
-
-  # To run the unit tests, the user must be in "video" group. 
-  # The nix builders are members of only "nixbld" group, so 
-  # they are able to compile the tests, but not to run them. 
-  # To verify the installation, add yourself to "video" group, 
-  # switch to a working directory which has both read and write 
-  # permissions, run: nix-shell -p pkgs.beignet, and execute:
-  # . beignet_setenv.sh && beignet_utest_run
-  doCheck = false; 
+  cmakeFlags = [ "-DCLANG_LIBRARY_DIR=${clang-unwrapped}/lib" ];
 
   buildInputs = [ 
     llvm 
     clang-unwrapped
-    cmake 
     libX11 
-    pkgconfig 
-    libdrm 
-    gl 
-    libXfixes 
+    libXext
     libpthreadstubs
+    libdrm 
     libXdmcp
     libXdamage
-    libXxf86vm
-    python
     ocl-icd
+    mesa_noglu
   ];
 
+  nativeBuildInputs = [
+    cmake
+    pkgconfig
+    python3
+  ];
+
+  passthru.utests = stdenv.mkDerivation rec {
+    name = "beignet-utests-${version}";
+    inherit version src;
+
+    preConfigure = ''
+      cd utests
+    '';
+
+    enableParallelBuilding = true;
+
+    nativeBuildInputs = [
+      cmake
+      python3
+      pkgconfig
+      makeWrapper
+    ];
+
+    buildInputs = [
+      ocl-icd
+    ];
+
+    installPhase = ''
+      wrapBin() {
+        install -Dm755 "$1" "$out/bin/$(basename "$1")"
+        wrapProgram "$out/bin/$(basename "$1")" \
+          --set OCL_BITCODE_LIB_PATH ${beignet}/lib/beignet/beignet.bc \
+          --set OCL_HEADER_FILE_DIR "${beignet}/lib/beignet/include" \
+          --set OCL_PCH_PATH "${beignet}/lib/beignet/beignet.pch" \
+          --set OCL_GBE_PATH "${beignet}/lib/beignet/libgbe.so" \
+          --set OCL_INTERP_PATH "${beignet}/lib/beignet/libgbeinterp.so" \
+          --set OCL_KERNEL_PATH "$out/lib/beignet/kernels" \
+          --set OCL_IGNORE_SELF_TEST 1
+      }
+
+      install -Dm755 libutests.so $out/lib/libutests.so
+      wrapBin utest_run
+      wrapBin flat_address_space
+      mkdir $out/lib/beignet
+      cp -r ../../kernels $out/lib/beignet
+    '';
+  };
+
   meta = with stdenv.lib; {
-    homepage = https://cgit.freedesktop.org/beignet/;
+    homepage = "https://cgit.freedesktop.org/beignet/";
     description = "OpenCL Library for Intel Ivy Bridge and newer GPUs";
     longDescription = ''
       The package provides an open source implementation of the OpenCL specification for Intel GPUs. 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 11b92df2988c..9542506d22d5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6815,10 +6815,7 @@ in
   beecrypt = callPackage ../development/libraries/beecrypt { };
 
   beignet = callPackage ../development/libraries/beignet {
-    inherit (llvmPackages_37) llvm clang-unwrapped;
-    inherit (xorg) libX11 libXfixes libpthreadstubs libXdmcp libXdamage libXxf86vm;
-    inherit (python3Packages) python;
-    inherit (purePackages) gl;
+    inherit (llvmPackages) llvm clang-unwrapped;
   };
 
   belle-sip = callPackage ../development/libraries/belle-sip { };