opencv3: use older cudatoolkit

pkgs/development/libraries/opencv/3.x.nix

@@ -165,8 +165,10 @@ stdenv.mkDerivation rec {
     (opencvFlag "OPENEXR" enableEXR)
     (opencvFlag "CUDA" enableCuda)
     (opencvFlag "CUBLAS" enableCuda)
-  ] ++ lib.optionals enableCuda [ "-DCUDA_FAST_MATH=ON" ]
-    ++ lib.optional buildContrib "-DBUILD_PROTOBUF=off"
+  ] ++ lib.optionals enableCuda [
+    "-DCUDA_FAST_MATH=ON"
+    "-DCUDA_HOST_COMPILER=${cudatoolkit.cc}/bin/gcc"
+  ] ++ lib.optional buildContrib "-DBUILD_PROTOBUF=off"
     ++ lib.optionals stdenv.isDarwin ["-DWITH_OPENCL=OFF" "-DWITH_LAPACK=OFF"];
 
   enableParallelBuilding = true;

pkgs/top-level/all-packages.nix

@@ -10014,6 +10014,7 @@ with pkgs;
 
   opencv3 = callPackage ../development/libraries/opencv/3.x.nix {
     enableCuda = config.cudaSupport or false;
+    cudatoolkit = cudatoolkit8;
     inherit (darwin.apple_sdk.frameworks) AVFoundation Cocoa QTKit;
   };