Add unified-runtime with CUDA

overlay.nix

@@ -79,6 +79,7 @@ let
     tampi = callPackage ./pkgs/tampi/default.nix { };
     tasycl = callPackage ./pkgs/tasycl/default.nix { };
     tasycl-acpp = callPackage ./pkgs/tasycl/default.nix { useIntel = false; };
+    unified-runtime = callPackage ./pkgs/unified-runtime/default.nix { };
     upc-qaire-exporter = prev.callPackage ./pkgs/upc-qaire-exporter/default.nix { };
     wxparaver = callPackage ./pkgs/paraver/default.nix { };
   };

pkgs/unified-runtime/default.nix

@@ -0,0 +1,63 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  python3,
+  cudatoolkit,
+  libbacktrace,
+  intel-compute-runtime,
+  level-zero,
+  unified-memory-framework,
+  autoAddDriverRunpath,
+
+  enableL0 ? false,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "unified-runtime";
+  version = "2025-WW45";
+
+  src = fetchFromGitHub {
+    owner = "intel";
+    repo = "llvm";
+    tag = version;
+    sha256 = "sha256-yf8pFEeNEWf9LpEhAy4vMdFDlA08x5XaCegnq+5aXRw=";
+  };
+
+  sourceRoot = "${src.name}/unified-runtime";
+
+  nativeBuildInputs = [
+    cmake
+    python3
+    libbacktrace
+    (python3.withPackages (
+      python-pkgs: with python-pkgs; [
+        lit
+        filecheck
+      ]
+    ))
+    autoAddDriverRunpath
+  ];
+
+  buildInputs = [
+    unified-memory-framework
+    cudatoolkit
+  ]
+  ++ lib.optionals enableL0 [
+    intel-compute-runtime
+    level-zero
+  ];
+
+  cmakeFlags = [
+    (lib.cmakeBool "UR_USE_EXTERNAL_UMF" true)
+    (lib.cmakeBool "UR_BUILD_TESTS" false)
+
+    (lib.cmakeBool "UR_BUILD_ADAPTER_CUDA" true)
+    (lib.cmakeBool "UR_BUILD_ADAPTER_L0" enableL0)
+
+    (lib.cmakeBool "UR_BUILD_ADAPTER_OPENCL" false)
+    (lib.cmakeBool "UR_BUILD_ADAPTER_HIP" false)
+    (lib.cmakeBool "UR_BUILD_ADAPTER_NATIVE_CPU" false)
+  ];
+}