diff --git a/pkgs/applications/misc/blender/default.nix b/pkgs/applications/misc/blender/default.nix
index 86b2ab6eb1c..b348f253b35 100644
--- a/pkgs/applications/misc/blender/default.nix
+++ b/pkgs/applications/misc/blender/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, stdenv_gcc5, lib, fetchurl, boost, cmake, ffmpeg, gettext, glew
+{ stdenv, lib, fetchurl, boost, cmake, ffmpeg, gettext, glew
 , ilmbase, libXi, libX11, libXext, libXrender
 , libjpeg, libpng, libsamplerate, libsndfile
 , libtiff, mesa, openal, opencolorio, openexr, openimageio, openjpeg_1, python
@@ -10,7 +10,7 @@
 
 with lib;
 
-(if cudaSupport then stdenv_gcc5 else stdenv).mkDerivation rec {
+stdenv.mkDerivation rec {
   name = "blender-2.79";
 
   src = fetchurl {
@@ -57,9 +57,8 @@ with lib;
     ++ optional jackaudioSupport "-DWITH_JACK=ON"
     ++ optionals cudaSupport
       [ "-DWITH_CYCLES_CUDA_BINARIES=ON"
-        # Disable the sm_20 architecture to work around a segfault in
-        # ptxas, as suggested on #blendercoders.
-        "-DCYCLES_CUDA_BINARIES_ARCH=sm_21;sm_30;sm_35;sm_37;sm_50;sm_52;sm_60;sm_61"
+        # Disable architectures before sm_30 to support new CUDA toolkits.
+        "-DCYCLES_CUDA_BINARIES_ARCH=sm_30;sm_35;sm_37;sm_50;sm_52;sm_60;sm_61"
       ]
     ++ optional colladaSupport "-DWITH_OPENCOLLADA=ON";
 
diff --git a/pkgs/applications/science/math/caffe/default.nix b/pkgs/applications/science/math/caffe/default.nix
index cb28d38bf1d..8dc3e3ce43d 100644
--- a/pkgs/applications/science/math/caffe/default.nix
+++ b/pkgs/applications/science/math/caffe/default.nix
@@ -22,22 +22,23 @@ assert pythonSupport -> (python != null && numpy != null);
 
 stdenv.mkDerivation rec {
   name = "caffe-${version}";
-  version = "1.0-rc5";
+  version = "1.0";
 
   src = fetchFromGitHub {
     owner = "BVLC";
     repo = "caffe";
-    rev = "rc5";
-    sha256 = "0lfmmc0n6xvkpygvxclzrvd0zigb4yfc5612anv2ahlxpfi9031c";
+    rev = version;
+    sha256 = "104jp3cm823i3cdph7hgsnj6l77ygbwsy35mdmzhmsi4jxprd9j3";
   };
 
   enableParallelBuilding = true;
 
   nativeBuildInputs = [ cmake doxygen ];
 
-  cmakeFlags = [ "-DCUDA_ARCH_NAME=All" ]
-               ++ lib.optional (!cudaSupport) "-DCPU_ONLY=ON"
-               ++ lib.optional (!pythonSupport) "-DBUILD_python=OFF";
+  cmakeFlags = [
+    "-DCUDA_ARCH_NAME=All"
+    (if pythonSupport then "-Dpython_version=${python.version}" else "-DBUILD_python=OFF")
+  ] ++ lib.optional (!cudaSupport) "-DCPU_ONLY=ON";
 
   buildInputs = [ boost google-gflags glog protobuf hdf5-cpp lmdb leveldb snappy opencv atlas ]
                 ++ lib.optional cudaSupport cudatoolkit
@@ -49,6 +50,16 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "out"];
   propagatedBuildOutputs = []; # otherwise propagates out -> bin cycle
 
+  preConfigure = lib.optionalString (cudaSupport && lib.versionAtLeast cudatoolkit.version "9.0") ''
+    # CUDA 9.0 doesn't support sm_20
+    sed -i 's,20 21(20) ,,' cmake/Cuda.cmake
+  '' + lib.optionalString (python.isPy3 or false) ''
+    sed -i \
+      -e 's,"python-py''${boost_py_version}",python3,g' \
+      -e 's,''${Boost_PYTHON-PY''${boost_py_version}_FOUND},''${Boost_PYTHON3_FOUND},g' \
+      cmake/Dependencies.cmake
+  '';
+
   postInstall = ''
     # Internal static library.
     rm $out/lib/libproto.a
diff --git a/pkgs/development/compilers/cudatoolkit/default.nix b/pkgs/development/compilers/cudatoolkit/default.nix
index f6e52a59fe5..62b2e7c1850 100644
--- a/pkgs/development/compilers/cudatoolkit/default.nix
+++ b/pkgs/development/compilers/cudatoolkit/default.nix
@@ -1,30 +1,44 @@
-{ lib, stdenv, fetchurl, patchelf, perl, ncurses, expat, python27, zlib
+{ lib, stdenv, makeWrapper, fetchurl, requireFile, patchelf, perl, ncurses, expat, python27, zlib
+, gcc48, gcc49, gcc5, gcc6
 , xorg, gtk2, glib, fontconfig, freetype, unixODBC, alsaLib, glibc
 }:
 
 let
 
   common =
-    { version, url, sha256
+    args@{ gcc, version, sha256
+    , url ? ""
+    , name ? ""
+    , developerProgram ? false
     , python ? python27
     }:
 
     stdenv.mkDerivation rec {
       name = "cudatoolkit-${version}";
+      inherit (args) version;
 
       dontPatchELF = true;
       dontStrip = true;
 
       src =
-        if stdenv.system == "x86_64-linux" then
-          fetchurl {
-            inherit url sha256;
+        if developerProgram then
+          requireFile {
+            message = ''
+              This nix expression requires that ${args.name} is already part of the store.
+              Register yourself to NVIDIA Accelerated Computing Developer Program, retrieve the CUDA toolkit
+              at https://developer.nvidia.com/cuda-toolkit, and run the following command in the download directory:
+              nix-prefetch-url file://${args.name}
+            '';
+            inherit (args) name sha256;
           }
-        else throw "cudatoolkit does not support platform ${stdenv.system}";
+        else
+          fetchurl {
+            inherit (args) url sha256;
+          };
 
       outputs = [ "out" "lib" "doc" ];
 
-      buildInputs = [ perl ];
+      nativeBuildInputs = [ perl makeWrapper ];
 
       runtimeDependencies = [
         ncurses expat python zlib glibc
@@ -37,8 +51,8 @@ let
       unpackPhase = ''
         sh $src --keep --noexec
         cd pkg/run_files
-        sh cuda-linux64-rel-${version}-*.run --keep --noexec
-        sh cuda-samples-linux-${version}-*.run --keep --noexec
+        sh cuda-linux*.run --keep --noexec
+        sh cuda-samples*.run --keep --noexec
         cd pkg
       '';
 
@@ -92,15 +106,25 @@ let
         # Remove OpenCL libraries as they are provided by ocl-icd and driver.
         rm -f $out/lib64/libOpenCL*
 
+        # Set compiler for NVCC.
+        wrapProgram $out/bin/nvcc \
+          --prefix PATH : ${gcc}/bin
       '' + lib.optionalString (lib.versionOlder version "8.0") ''
         # Hack to fix building against recent Glibc/GCC.
         echo "NIX_CFLAGS_COMPILE+=' -D_FORCE_INLINES'" >> $out/nix-support/setup-hook
       '';
 
+      passthru = {
+        cc = gcc;
+        majorVersion =
+          let versionParts = lib.splitString "." version;
+          in "${lib.elemAt versionParts 0}.${lib.elemAt versionParts 1}";
+      };
+
       meta = with stdenv.lib; {
         description = "A compiler for NVIDIA GPUs, math libraries, and tools";
-        homepage = https://developer.nvidia.com/cuda-toolkit;
-        platforms = platforms.linux;
+        homepage = "https://developer.nvidia.com/cuda-toolkit";
+        platforms = [ "x86_64-linux" ];
         license = licenses.unfree;
       };
     };
@@ -109,32 +133,44 @@ in {
 
   cudatoolkit6 = common {
     version = "6.0.37";
-    url = http://developer.download.nvidia.com/compute/cuda/6_0/rel/installers/cuda_6.0.37_linux_64.run;
+    url = "http://developer.download.nvidia.com/compute/cuda/6_0/rel/installers/cuda_6.0.37_linux_64.run";
     sha256 = "991e436c7a6c94ec67cf44204d136adfef87baa3ded270544fa211179779bc40";
+    gcc = gcc48;
   };
 
   cudatoolkit65 = common {
     version = "6.5.19";
-    url = http://developer.download.nvidia.com/compute/cuda/6_5/rel/installers/cuda_6.5.19_linux_64.run;
+    url = "http://developer.download.nvidia.com/compute/cuda/6_5/rel/installers/cuda_6.5.19_linux_64.run";
     sha256 = "1x9zdmk8z784d3d35vr2ak1l4h5v4jfjhpxfi9fl9dvjkcavqyaj";
+    gcc = gcc48;
   };
 
   cudatoolkit7 = common {
     version = "7.0.28";
-    url = http://developer.download.nvidia.com/compute/cuda/7_0/Prod/local_installers/cuda_7.0.28_linux.run;
+    url = "http://developer.download.nvidia.com/compute/cuda/7_0/Prod/local_installers/cuda_7.0.28_linux.run";
     sha256 = "1km5hpiimx11jcazg0h3mjzk220klwahs2vfqhjavpds5ff2wafi";
+    gcc = gcc49;
   };
 
   cudatoolkit75 = common {
     version = "7.5.18";
-    url = http://developer.download.nvidia.com/compute/cuda/7.5/Prod/local_installers/cuda_7.5.18_linux.run;
+    url = "http://developer.download.nvidia.com/compute/cuda/7.5/Prod/local_installers/cuda_7.5.18_linux.run";
     sha256 = "1v2ylzp34ijyhcxyh5p6i0cwawwbbdhni2l5l4qm21s1cx9ish88";
+    gcc = gcc49;
   };
 
   cudatoolkit8 = common {
     version = "8.0.61";
-    url = https://developer.nvidia.com/compute/cuda/8.0/Prod2/local_installers/cuda_8.0.61_375.26_linux-run;
+    url = "https://developer.nvidia.com/compute/cuda/8.0/Prod2/local_installers/cuda_8.0.61_375.26_linux-run";
     sha256 = "1i4xrsqbad283qffvysn88w2pmxzxbbby41lw0j1113z771akv4w";
+    gcc = gcc5;
+  };
+
+  cudatoolkit9 = common {
+    version = "9.0.176";
+    url = "https://developer.nvidia.com/compute/cuda/9.0/Prod/local_installers/cuda_9.0.176_384.81_linux-run";
+    sha256 = "0308rmmychxfa4inb1ird9bpgfppgr9yrfg1qp0val5azqik91ln";
+    gcc = gcc6;
   };
 
 }
diff --git a/pkgs/development/libraries/opencv/3.x.nix b/pkgs/development/libraries/opencv/3.x.nix
index 8596ab6de88..ecb7bf78b20 100644
--- a/pkgs/development/libraries/opencv/3.x.nix
+++ b/pkgs/development/libraries/opencv/3.x.nix
@@ -16,7 +16,7 @@
 , enableGStreamer ? false, gst_all_1
 , enableEigen     ? true, eigen
 , enableOpenblas  ? true, openblas
-, enableCuda      ? false, cudatoolkit, gcc5
+, enableCuda      ? false, cudatoolkit
 , enableTesseract ? false, tesseract, leptonica
 , AVFoundation, Cocoa, QTKit
 }:
@@ -145,7 +145,7 @@ stdenv.mkDerivation rec {
     # simply enabled automatically if contrib is built, and it detects
     # tesseract & leptonica.
     ++ lib.optionals enableTesseract [ tesseract leptonica ]
-    ++ lib.optionals enableCuda [ cudatoolkit gcc5 ]
+    ++ lib.optional enableCuda cudatoolkit
     ++ lib.optional buildContrib protobuf
     ++ lib.optionals stdenv.isDarwin [ AVFoundation Cocoa QTKit ];
 
@@ -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;
diff --git a/pkgs/development/libraries/opensubdiv/default.nix b/pkgs/development/libraries/opensubdiv/default.nix
index 442a8444942..91899ad8da4 100644
--- a/pkgs/development/libraries/opensubdiv/default.nix
+++ b/pkgs/development/libraries/opensubdiv/default.nix
@@ -1,17 +1,17 @@
-{ lib, stdenv, stdenv_gcc5, fetchurl, fetchFromGitHub, cmake, pkgconfig, xorg, mesa_glu
+{ lib, stdenv, fetchurl, fetchFromGitHub, cmake, pkgconfig, xorg, mesa_glu
 , mesa_noglu, glew, ocl-icd, python3
 , cudaSupport ? false, cudatoolkit
 }:
 
-(if cudaSupport then stdenv_gcc5 else stdenv).mkDerivation rec {
+stdenv.mkDerivation rec {
   name = "opensubdiv-${version}";
-  version = "3.2.0";
+  version = "3.3.0";
 
   src = fetchFromGitHub {
     owner = "PixarAnimationStudios";
     repo = "OpenSubdiv";
     rev = "v${lib.replaceChars ["."] ["_"] version}";
-    sha256 = "0wk12n1s8za3sz8d6bmfm3rfjyx20j48gy1xp57dvbnjvlvzqy3w";
+    sha256 = "0wpjwfik4q9s4r30hndhzmfyzv968mmg5lgng0123l07mn47d2yl";
   };
 
   outputs = [ "out" "dev" ];
@@ -30,7 +30,7 @@
       "-DNO_EXAMPLES=1"
       "-DGLEW_INCLUDE_DIR=${glew.dev}/include"
       "-DGLEW_LIBRARY=${glew.dev}/lib"
-    ];
+    ] ++ lib.optional cudaSupport "-DOSD_CUDA_NVCC_FLAGS=--gpu-architecture=compute_30";
 
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/libraries/science/math/clblas/cuda/default.nix b/pkgs/development/libraries/science/math/clblas/cuda/default.nix
deleted file mode 100644
index ae568bc6db1..00000000000
--- a/pkgs/development/libraries/science/math/clblas/cuda/default.nix
+++ /dev/null
@@ -1,73 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, cmake
-, gfortran
-, blas
-, boost
-, python
-, ocl-icd
-, cudatoolkit
-, nvidia_x11
-, gtest
-}:
-
-stdenv.mkDerivation rec {
-  name = "clblas-cuda-${version}"; 
-  version = "git-20160505"; 
-
-  src = fetchFromGitHub {
-    owner = "clMathLibraries"; 
-    repo = "clBLAS";
-    rev = "d20977ec4389c6b3751e318779410007c5e272f8";
-    sha256 = "1jna176cxznv7iz43svd6cjrbbf0fc2lrbpfpg4s08vc7xnwp0n4";
-  }; 
-
-  patches = [ ./platform.patch ]; 
-
-  postPatch = ''
-    sed -i -re 's/(set\(\s*Boost_USE_STATIC_LIBS\s+).*/\1OFF\ \)/g' src/CMakeLists.txt
-  '';
-
-  configurePhase = ''
-    findInputs ${boost.dev} boost_dirs propagated-native-build-inputs
-
-    export BOOST_INCLUDEDIR=$(echo $boost_dirs | sed -e s/\ /\\n/g - | grep '\-dev')/include
-    export BOOST_LIBRARYDIR=$(echo $boost_dirs | sed -e s/\ /\\n/g - | grep -v '\-dev')/lib
-
-    mkdir -p Build
-    pushd Build
-
-    export LD_LIBRARY_PATH="${stdenv.lib.makeLibraryPath [ blas nvidia_x11 ]}"
-
-    cmake ../src -DCMAKE_INSTALL_PREFIX=$out \
-                 -DCMAKE_BUILD_TYPE=Release \
-                 -DOPENCL_ROOT=${cudatoolkit} \
-                 -DUSE_SYSTEM_GTEST=ON
-  '';
-
-  dontStrip = true; 
-
-  buildInputs = [
-    cmake
-    gfortran
-    blas
-    python
-    ocl-icd
-    cudatoolkit
-    nvidia_x11
-    gtest
-  ]; 
-
-  meta = with stdenv.lib; {
-    homepage = https://github.com/clMathLibraries/clBLAS;
-    description = "A software library containing BLAS functions written in OpenCL";
-    longDescription = ''
-      This package contains a library of BLAS functions on top of OpenCL. 
-      The current version is linked to the NVIDIA OpenCL implementation provided by the CUDA toolkit. 
-    '';
-    license = licenses.asl20;
-    maintainers = with maintainers; [ artuuge ];
-    platforms = platforms.linux;
-  };
-
-}
diff --git a/pkgs/development/libraries/science/math/clblas/default.nix b/pkgs/development/libraries/science/math/clblas/default.nix
new file mode 100644
index 00000000000..40b02d30341
--- /dev/null
+++ b/pkgs/development/libraries/science/math/clblas/default.nix
@@ -0,0 +1,62 @@
+{ stdenv
+, fetchFromGitHub
+, cmake
+, gfortran
+, blas
+, boost
+, python
+, ocl-icd
+, opencl-headers
+, gtest
+}:
+
+stdenv.mkDerivation rec {
+  name = "clblas-${version}"; 
+  version = "2.12";
+
+  src = fetchFromGitHub {
+    owner = "clMathLibraries"; 
+    repo = "clBLAS";
+    rev = "v${version}";
+    sha256 = "154mz52r5hm0jrp5fqrirzzbki14c1jkacj75flplnykbl36ibjs";
+  }; 
+
+  patches = [ ./platform.patch ]; 
+
+  postPatch = ''
+    sed -i -re 's/(set\(\s*Boost_USE_STATIC_LIBS\s+).*/\1OFF\ \)/g' src/CMakeLists.txt
+  '';
+
+  preConfigure = ''
+    cd src
+  '';
+
+  cmakeFlags = [
+    "-DUSE_SYSTEM_GTEST=ON"
+  ];
+
+  buildInputs = [
+    cmake
+    gfortran
+    blas
+    python
+    ocl-icd
+    opencl-headers
+    boost
+    gtest
+  ]; 
+
+  enableParallelBuilding = true;
+
+  meta = with stdenv.lib; {
+    homepage = "https://github.com/clMathLibraries/clBLAS";
+    description = "A software library containing BLAS functions written in OpenCL";
+    longDescription = ''
+      This package contains a library of BLAS functions on top of OpenCL. 
+    '';
+    license = licenses.asl20;
+    maintainers = with maintainers; [ artuuge ];
+    platforms = platforms.linux;
+  };
+
+}
diff --git a/pkgs/development/libraries/science/math/clblas/cuda/platform.patch b/pkgs/development/libraries/science/math/clblas/platform.patch
similarity index 100%
rename from pkgs/development/libraries/science/math/clblas/cuda/platform.patch
rename to pkgs/development/libraries/science/math/clblas/platform.patch
diff --git a/pkgs/development/libraries/science/math/cudnn/7.5-5.0/default.nix b/pkgs/development/libraries/science/math/cudnn/7.5-5.0/default.nix
deleted file mode 100644
index 2e0b98496f3..00000000000
--- a/pkgs/development/libraries/science/math/cudnn/7.5-5.0/default.nix
+++ /dev/null
@@ -1,46 +0,0 @@
-{ stdenv
-, requireFile
-, cudatoolkit
-}:
-
-stdenv.mkDerivation rec {
-  version = "5.0";
-  cudatoolkit_version = "7.5";
-
-  name = "cudatoolkit-${cudatoolkit_version}-cudnn-${version}";
-
-  src = requireFile rec {
-    name = "cudnn-${cudatoolkit_version}-linux-x64-v${version}-ga.tgz";
-    message = ''
-      This nix expression requires that ${name} is already part of the store.
-      Register yourself to NVIDIA Accelerated Computing Developer Program, retrieve the cuDNN library
-      at https://developer.nvidia.com/cudnn, and run the following command in the download directory:
-      nix-prefetch-url file://${name}
-    '';
-    sha256 = "c4739a00608c3b66a004a74fc8e721848f9112c5cb15f730c1be4964b3a23b3a";
-  };
-
-  phases = "unpackPhase installPhase fixupPhase";
-
-  installPhase = ''
-    function fixRunPath {
-      p=$(patchelf --print-rpath $1)
-      patchelf --set-rpath "$p:${stdenv.lib.makeLibraryPath [ stdenv.cc.cc ]}" $1
-    }
-    fixRunPath lib64/libcudnn.so
-
-    mkdir -p $out
-    cp -a include $out/include
-    cp -a lib64 $out/lib64
-  '';
-
-  propagatedBuildInputs = [
-    cudatoolkit
-  ];
-
-  meta = {
-    description = "NVIDIA CUDA Deep Neural Network library (cuDNN)";
-    homepage = https://developer.nvidia.com/cudnn;
-    license = stdenv.lib.licenses.unfree;
-  };
-}
diff --git a/pkgs/development/libraries/science/math/cudnn/8.0-5.1/default.nix b/pkgs/development/libraries/science/math/cudnn/8.0-5.1/default.nix
deleted file mode 100644
index fd98001da82..00000000000
--- a/pkgs/development/libraries/science/math/cudnn/8.0-5.1/default.nix
+++ /dev/null
@@ -1,40 +0,0 @@
-{ stdenv
-, requireFile
-, cudatoolkit
-, fetchurl
-}:
-
-stdenv.mkDerivation rec {
-  version = "5.1";
-  cudatoolkit_version = "8.0";
-
-  name = "cudatoolkit-${cudatoolkit_version}-cudnn-${version}";
-
-  src = fetchurl {
-    url = "http://developer.download.nvidia.com/compute/redist/cudnn/v5.1/cudnn-8.0-linux-x64-v5.1.tgz";
-    sha256 = "1kj50smlkm347wfbfqvy09ylvad1zapqjc9yqvfykmiddyrij1y1";
-  };
-
-  installPhase = ''
-    function fixRunPath {
-      p=$(patchelf --print-rpath $1)
-      patchelf --set-rpath "$p:${stdenv.lib.makeLibraryPath [ stdenv.cc.cc ]}" $1
-    }
-    fixRunPath lib64/libcudnn.so
-
-    mkdir -p $out
-    cp -a include $out/include
-    cp -a lib64 $out/lib64
-  '';
-
-  propagatedBuildInputs = [
-    cudatoolkit
-  ];
-
-  meta = with stdenv.lib; {
-    description = "NVIDIA CUDA Deep Neural Network library (cuDNN)";
-    homepage = https://developer.nvidia.com/cudnn;
-    license = stdenv.lib.licenses.unfree;
-    maintainers = with maintainers; [ mdaiter ];
-  };
-}
diff --git a/pkgs/development/libraries/science/math/cudnn/8.0-6.0/default.nix b/pkgs/development/libraries/science/math/cudnn/8.0-6.0/default.nix
deleted file mode 100644
index f0cfb906b1f..00000000000
--- a/pkgs/development/libraries/science/math/cudnn/8.0-6.0/default.nix
+++ /dev/null
@@ -1,40 +0,0 @@
-{ stdenv
-, requireFile
-, cudatoolkit
-, fetchurl
-}:
-
-stdenv.mkDerivation rec {
-  version = "6.0";
-  cudatoolkit_version = "8.0";
-
-  name = "cudatoolkit-${cudatoolkit_version}-cudnn-${version}";
-
-  src = fetchurl {
-    url = "http://developer.download.nvidia.com/compute/redist/cudnn/v6.0/cudnn-8.0-linux-x64-v6.0.tgz";
-    sha256 = "173zpgrk55ri8if7s5yngsc89ajd6hz4pss4cdxlv6lcyh5122cv";
-  };
-
-  installPhase = ''
-    function fixRunPath {
-      p=$(patchelf --print-rpath $1)
-      patchelf --set-rpath "$p:${stdenv.lib.makeLibraryPath [ stdenv.cc.cc ]}" $1
-    }
-    fixRunPath lib64/libcudnn.so
-
-    mkdir -p $out
-    cp -a include $out/include
-    cp -a lib64 $out/lib64
-  '';
-
-  propagatedBuildInputs = [
-    cudatoolkit
-  ];
-
-  meta = with stdenv.lib; {
-    description = "NVIDIA CUDA Deep Neural Network library (cuDNN)";
-    homepage = https://developer.nvidia.com/cudnn;
-    license = stdenv.lib.licenses.unfree;
-    maintainers = with maintainers; [ jyp ];
-  };
-}
diff --git a/pkgs/development/libraries/science/math/cudnn/default.nix b/pkgs/development/libraries/science/math/cudnn/default.nix
index 1e1a37af2f0..db66d854588 100644
--- a/pkgs/development/libraries/science/math/cudnn/default.nix
+++ b/pkgs/development/libraries/science/math/cudnn/default.nix
@@ -1,34 +1,45 @@
-{ stdenv, requireFile, cudatoolkit }:
-
-stdenv.mkDerivation rec {
-  version = "4.0";
-
-  name = "cudnn-${version}";
-
-  src = requireFile rec {
-    name = "cudnn-7.0-linux-x64-v${version}-prod.tgz";
-    message = '' 
-      This nix expression requires that ${name} is
-      already part of the store. Register yourself to NVIDIA Accelerated Computing Developer Program
-      and download cuDNN library at https://developer.nvidia.com/cudnn, and store it to the nix store with nix-store --add-fixed sha256 <FILE>.
-    '';
-    sha256 = "0zgr6qdbc29qw6sikhrh6diwwz7150rqc8a49f2qf37j2rvyyr2f";
+{ callPackage, cudatoolkit7, cudatoolkit75, cudatoolkit8, cudatoolkit9 }:
 
+let
+  generic = args: callPackage (import ./generic.nix (removeAttrs args ["cudatoolkit"])) {
+    inherit (args) cudatoolkit;
   };
 
-  phases = "unpackPhase installPhase fixupPhase";
+in
 
-  propagatedBuildInputs = [ cudatoolkit ];
+{
+  cudnn_cudatoolkit7 = generic rec {
+    version = "4.0";
+    cudatoolkit = cudatoolkit7;
+    srcName = "cudnn-${cudatoolkit.majorVersion}-linux-x64-v${version}-prod.tgz";
+    sha256 = "0zgr6qdbc29qw6sikhrh6diwwz7150rqc8a49f2qf37j2rvyyr2f";
+  };
 
-  installPhase = ''
-    mkdir -p $out
-    cp -a include $out/include
-    cp -a lib64 $out/lib64
-  '';
+  cudnn_cudatoolkit75 = generic rec {
+    version = "6.0";
+    cudatoolkit = cudatoolkit75;
+    srcName = "cudnn-${cudatoolkit.majorVersion}-linux-x64-v${version}.tgz";
+    sha256 = "0b68hv8pqcvh7z8xlgm4cxr9rfbjs0yvg1xj2n5ap4az1h3lp3an";
+  };
 
-  meta = {
-    description = "NVIDIA CUDA Deep Neural Network library (cuDNN)";
-    homepage = https://developer.nvidia.com/cudnn;
-    license = stdenv.lib.licenses.unfree;
+  cudnn6_cudatoolkit8 = generic rec {
+    version = "6.0";
+    cudatoolkit = cudatoolkit8;
+    srcName = "cudnn-${cudatoolkit.majorVersion}-linux-x64-v${version}.tgz";
+    sha256 = "173zpgrk55ri8if7s5yngsc89ajd6hz4pss4cdxlv6lcyh5122cv";
+  };
+
+  cudnn_cudatoolkit8 = generic rec {
+    version = "7.0";
+    cudatoolkit = cudatoolkit8;
+    srcName = "cudnn-${cudatoolkit.majorVersion}-linux-x64-v7.tgz";
+    sha256 = "19yjdslrslwv5ic4vgpzb0fa0mqbgi6a66b7gc66vdc9n9589398";
+  };
+
+  cudnn_cudatoolkit9 = generic rec {
+    version = "7.0";
+    cudatoolkit = cudatoolkit9;
+    srcName = "cudnn-${cudatoolkit.majorVersion}-linux-x64-v7.tgz";
+    sha256 = "1ld5x819vya6p2ppmr7i3lz9ac2y81kssgbzgd0lsign7r2qjapc";
   };
 }
diff --git a/pkgs/development/libraries/science/math/cudnn/8.0-5.0/default.nix b/pkgs/development/libraries/science/math/cudnn/generic.nix
similarity index 64%
rename from pkgs/development/libraries/science/math/cudnn/8.0-5.0/default.nix
rename to pkgs/development/libraries/science/math/cudnn/generic.nix
index a0d8baae78f..663b741e474 100644
--- a/pkgs/development/libraries/science/math/cudnn/8.0-5.0/default.nix
+++ b/pkgs/development/libraries/science/math/cudnn/generic.nix
@@ -1,29 +1,34 @@
+{ version
+, srcName
+, sha256
+}:
+
 { stdenv
+, lib
 , requireFile
 , cudatoolkit
 }:
 
 stdenv.mkDerivation rec {
-  version = "5.0";
-  cudatoolkit_version = "8.0";
+  name = "cudatoolkit-${cudatoolkit.majorVersion}-cudnn-${version}";
 
-  name = "cudatoolkit-${cudatoolkit_version}-cudnn-${version}";
+  inherit version;
 
   src = requireFile rec {
-    name = "cudnn-${cudatoolkit_version}-linux-x64-v${version}-ga.tgz";
+    name = srcName;
+    inherit sha256;
     message = ''
       This nix expression requires that ${name} is already part of the store.
       Register yourself to NVIDIA Accelerated Computing Developer Program, retrieve the cuDNN library
       at https://developer.nvidia.com/cudnn, and run the following command in the download directory:
       nix-prefetch-url file://${name}
     '';
-    sha256 = "af80eb1ce0cb51e6a734b2bdc599e6d50b676eab3921e5bddfe5443485df86b6";
   };
 
   installPhase = ''
     function fixRunPath {
       p=$(patchelf --print-rpath $1)
-      patchelf --set-rpath "$p:${stdenv.lib.makeLibraryPath [ stdenv.cc.cc ]}" $1
+      patchelf --set-rpath "$p:${lib.makeLibraryPath [ stdenv.cc.cc ]}" $1
     }
     fixRunPath lib64/libcudnn.so
 
@@ -36,10 +41,16 @@ stdenv.mkDerivation rec {
     cudatoolkit
   ];
 
+  passthru = {
+    inherit cudatoolkit;
+    majorVersion = lib.head (lib.splitString "." version);
+  };
+
   meta = with stdenv.lib; {
     description = "NVIDIA CUDA Deep Neural Network library (cuDNN)";
-    homepage = https://developer.nvidia.com/cudnn;
-    license = stdenv.lib.licenses.unfree;
+    homepage = "https://developer.nvidia.com/cudnn";
+    license = licenses.unfree;
+    platforms = [ "x86_64-linux" ];
     maintainers = with maintainers; [ mdaiter ];
   };
 }
diff --git a/pkgs/development/python-modules/Theano/default.nix b/pkgs/development/python-modules/Theano/default.nix
new file mode 100644
index 00000000000..e0ff839ce1b
--- /dev/null
+++ b/pkgs/development/python-modules/Theano/default.nix
@@ -0,0 +1,75 @@
+{ stdenv
+, lib
+, fetchPypi
+, gcc
+, writeScriptBin
+, buildPythonPackage
+, isPyPy
+, pythonOlder
+, isPy3k
+, nose
+, numpy
+, pydot_ng
+, scipy
+, six
+, libgpuarray
+, cudaSupport ? false, cudatoolkit
+, cudnnSupport ? false, cudnn
+}:
+
+assert cudnnSupport -> cudaSupport;
+
+let
+  extraFlags =
+    lib.optionals cudaSupport [ "-I ${cudatoolkit}/include" "-L ${cudatoolkit}/lib" ]
+    ++ lib.optionals cudnnSupport [ "-I ${cudnn}/include" "-L ${cudnn}/lib" ];
+
+  gcc_ = writeScriptBin "g++" ''
+    #!${stdenv.shell}
+    export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE ${toString extraFlags}"
+    exec ${gcc}/bin/g++ "$@"
+  '';
+
+  libgpuarray_ = libgpuarray.override { inherit cudaSupport; };
+
+in buildPythonPackage rec {
+  name = "${pname}-${version}";
+  pname = "Theano";
+  version = "0.9.0";
+
+  disabled = isPyPy || pythonOlder "2.6" || (isPy3k && pythonOlder "3.3");
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "05xwg00da8smkvkh6ywbywqzj8dw7x840jr74wqhdy9icmqncpbl";
+  };
+
+  postPatch = ''
+    sed -i 's,g++,${gcc_}/bin/g++,g' theano/configdefaults.py
+  '' + lib.optionalString cudnnSupport ''
+    sed -i \
+      -e "s,ctypes.util.find_library('cudnn'),'${cudnn}/lib/libcudnn.so',g" \
+      -e "s/= _dnn_check_compile()/= (True, None)/g" \
+      theano/gpuarray/dnn.py
+  '';
+
+  preCheck = ''
+    mkdir -p check-phase
+    export HOME=$(pwd)/check-phase
+  '';
+  doCheck = false;
+  # takes far too long, also throws "TypeError: sort() missing 1 required positional argument: 'a'"
+  # when run from the installer, and testing with Python 3.5 hits github.com/Theano/Theano/issues/4276,
+  # the fix for which hasn't been merged yet.
+
+  # keep Nose around since running the tests by hand is possible from Python or bash
+  checkInputs = [ nose ];
+  propagatedBuildInputs = [ numpy numpy.blas scipy six libgpuarray_ ];
+
+  meta = with stdenv.lib; {
+    homepage = http://deeplearning.net/software/theano/;
+    description = "A Python library for large-scale array computation";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ maintainers.bcdarwin ];
+  };
+}
diff --git a/pkgs/development/python-modules/Theano/theano-with-cuda/default.nix b/pkgs/development/python-modules/Theano/theano-with-cuda/default.nix
deleted file mode 100644
index f8b7a713d08..00000000000
--- a/pkgs/development/python-modules/Theano/theano-with-cuda/default.nix
+++ /dev/null
@@ -1,65 +0,0 @@
-{ buildPythonPackage
-, fetchFromGitHub
-, pythonOlder
-, future
-, numpy
-, six
-, scipy
-, nose
-, nose-parameterized
-, pydot_ng
-, sphinx
-, pygments
-, libgpuarray
-, python
-, pycuda
-, cudatoolkit
-, cudnn
-, stdenv
-}:
-
-buildPythonPackage rec {
-  name = "Theano-cuda-${version}";
-  version = "0.8.2";
-
-  src = fetchFromGitHub {
-    owner = "Theano";
-    repo = "Theano";
-    rev = "46fbfeb628220b5e42bf8277a5955c52d153e874";
-    sha256 = "1sl91gli3jaw5gpjqqab4fiq4x6282spqciaid1s65pjsf3k55sc";
-  };
-
-  doCheck = false;
-
-  patchPhase = ''
-    pushd theano/sandbox/gpuarray
-    sed -i -re '2s/^/from builtins import bytes\n/g' subtensor.py
-    sed -i -re "s/(b'2')/int(bytes(\1))/g" subtensor.py
-    sed -i -re "s/(ctx.bin_id\[\-2\])/int(\1)/g" subtensor.py
-
-    sed -i -re '2s/^/from builtins import bytes\n/g' dnn.py
-    sed -i -re "s/(b'30')/int(bytes(\1))/g" dnn.py
-    sed -i -re "s/(ctx.bin_id\[\-2:\])/int(\1)/g" dnn.py
-    popd
-  '';
-
-  dontStrip = true;
-
-  propagatedBuildInputs = [
-    numpy.blas
-    numpy
-    six
-    scipy
-    nose
-    nose-parameterized
-    pydot_ng
-    sphinx
-    pygments
-    pycuda
-    cudatoolkit
-    libgpuarray
-    cudnn
-  ] ++ (stdenv.lib.optional (pythonOlder "3.0") future);
-
-  passthru.cudaSupport = true;
-}
diff --git a/pkgs/development/python-modules/Theano/theano-without-cuda/default.nix b/pkgs/development/python-modules/Theano/theano-without-cuda/default.nix
deleted file mode 100644
index e93af743619..00000000000
--- a/pkgs/development/python-modules/Theano/theano-without-cuda/default.nix
+++ /dev/null
@@ -1,44 +0,0 @@
-{ stdenv
-, fetchurl
-, buildPythonPackage
-, isPyPy
-, pythonOlder
-, isPy3k
-, nose
-, numpy
-, pydot_ng
-, scipy
-, six
-}:
-
-buildPythonPackage rec {
-  name = "Theano-0.9.0";
-
-  disabled = isPyPy || pythonOlder "2.6" || (isPy3k && pythonOlder "3.3");
-
-  src = fetchurl {
-    url = "mirror://pypi/T/Theano/${name}.tar.gz";
-    sha256 = "05xwg00da8smkvkh6ywbywqzj8dw7x840jr74wqhdy9icmqncpbl";
-  };
-
-  #preCheck = ''
-  #  mkdir -p check-phase
-  #  export HOME=$(pwd)/check-phase
-  #'';
-  doCheck = false;
-  # takes far too long, also throws "TypeError: sort() missing 1 required positional argument: 'a'"
-  # when run from the installer, and testing with Python 3.5 hits github.com/Theano/Theano/issues/4276,
-  # the fix for which hasn't been merged yet.
-
-  # keep Nose around since running the tests by hand is possible from Python or bash
-  propagatedBuildInputs = [ nose numpy numpy.blas pydot_ng scipy six ];
-
-  meta = {
-    homepage = http://deeplearning.net/software/theano/;
-    description = "A Python library for large-scale array computation";
-    license = stdenv.lib.licenses.bsd3;
-    maintainers = [ stdenv.lib.maintainers.bcdarwin ];
-  };
-
-  passthru.cudaSupport = false;
-}
diff --git a/pkgs/development/python-modules/libgpuarray/cuda/default.nix b/pkgs/development/python-modules/libgpuarray/cuda/default.nix
deleted file mode 100644
index a9c64cd7d7f..00000000000
--- a/pkgs/development/python-modules/libgpuarray/cuda/default.nix
+++ /dev/null
@@ -1,129 +0,0 @@
-{ stdenv 
-, buildPythonPackage
-, fetchFromGitHub
-, cmake
-, cython
-, numpy
-, Mako
-, six
-, nose
-, beaker
-, memcached
-, pkgconfig
-, glibc
-, clblas
-, Babel
-, pygments
-, scipy
-, python
-, cudatoolkit
-, nvidia_x11
-}: 
-buildPythonPackage rec {
-  name = "libgpuarray-cuda-${version}";
-  version = "-9998.0"; 
-
-  src = fetchFromGitHub {
-    owner = "Theano"; 
-    repo = "libgpuarray";
-    rev = "fc36a40526c0a8303ace6c574ffdefba7feafe17"; 
-    sha256 = "1kb0k42addqjxiahlcbv6v6271yhsmz71j12186fpy60870i7zm7"; 
-  }; 
-
-  doCheck = true;
-
-  configurePhase = ''
-    mkdir -p Build/Install
-    pushd Build
-
-    cmake .. -DCMAKE_BUILD_TYPE=Release \
-             -DCMAKE_INSTALL_PREFIX=./Install \
-             -DCLBLAS_ROOT_DIR=${clblas}
-
-    popd
-  ''; 
-
-  preBuild = ''
-    pushd Build
-    make 
-    make install
-
-    function fixRunPath {
-      p=$(patchelf --print-rpath $1)
-      patchelf --set-rpath "$p:${stdenv.lib.makeLibraryPath [ cudatoolkit clblas nvidia_x11 ]}" $1
-    }
-
-    fixRunPath Install/lib/libgpuarray.so
-
-    popd
-  ''; 
-
-  setupPyBuildFlags = [ "-L $(pwd)/Build/Install/lib" "-I $(pwd)/Build/Install/include" ];
-
-  preInstall = ''
-    cp -r Build/Install $out
-  '';
-
-  postInstall = ''
-    pushd $out/${python.sitePackages}/pygpu
-    for f in $(find $out/pygpu -name "*.h"); do
-      ln -s $f $(basename $f)
-    done
-    popd
-  ''; 
-  checkPhase = ''
-    mkdir -p my_bin
-    pushd my_bin
-
-    cat > libgpuarray_run_tests << EOF
-#!/bin/sh
-if [ \$# -eq 0 ]; then 
-  echo "No argument provided."
-  echo "Available tests:"
-  ls $out/${python.sitePackages}/pygpu/tests | grep "test_"
-  exit 1
-else
-  nosetests -v "$out/${python.sitePackages}/pygpu/tests/\$@"
-fi
-EOF
-
-    chmod +x libgpuarray_run_tests
-    popd
-
-    cp -r my_bin $out/bin
-  '';
-
-  dontStrip = true; 
-
-  propagatedBuildInputs = [
-    numpy
-    scipy
-    nose
-    six
-    Mako
-  ];
-
-  buildInputs = [ 
-    cmake 
-    cython 
-    beaker 
-    memcached 
-    pkgconfig 
-    glibc 
-    Babel 
-    pygments 
-    numpy.blas 
-    cudatoolkit
-    nvidia_x11
-    clblas
-  ]; 
-
-  meta = with stdenv.lib; {
-    homepage = https://github.com/Theano/libgpuarray;
-    description = "Library to manipulate tensors on GPU.";
-    license = licenses.free;
-    maintainers = with maintainers; [ artuuge ];
-    platforms = platforms.linux;
-  };
-
-}
diff --git a/pkgs/development/python-modules/libgpuarray/default.nix b/pkgs/development/python-modules/libgpuarray/default.nix
new file mode 100644
index 00000000000..3c24c2ed24c
--- /dev/null
+++ b/pkgs/development/python-modules/libgpuarray/default.nix
@@ -0,0 +1,81 @@
+{ stdenv 
+, lib
+, buildPythonPackage
+, fetchFromGitHub
+, cmake
+, cython
+, numpy
+, six
+, nose
+, Mako
+, python
+, cudaSupport ? false, cudatoolkit
+, openclSupport ? true, ocl-icd, clblas
+}: 
+
+buildPythonPackage rec {
+  name = "libgpuarray-${version}";
+  version = "0.6.9";
+
+  src = fetchFromGitHub {
+    owner = "Theano"; 
+    repo = "libgpuarray";
+    rev = "v${version}";
+    sha256 = "06z47ls42a37gbv0x7f3l1qvils7q0hvy02s95l530klgibp19s0";
+  }; 
+
+  # requires a GPU
+  doCheck = false;
+
+  configurePhase = "cmakeConfigurePhase";
+
+  libraryPath = lib.makeLibraryPath (
+    []
+    ++ lib.optionals cudaSupport [ cudatoolkit.lib cudatoolkit.out ]
+    ++ lib.optionals openclSupport [ ocl-icd clblas ]
+  );
+
+  preBuild = ''
+    make -j$NIX_BUILD_CORES
+    make install
+
+    ls $out/lib
+    export NIX_CFLAGS_COMPILE="-L $out/lib -I $out/include $NIX_CFLAGS_COMPILE"
+
+    cd ..
+  ''; 
+
+  postFixup = ''
+    rm $out/lib/libgpuarray-static.a
+
+    function fixRunPath {
+      p=$(patchelf --print-rpath $1)
+      patchelf --set-rpath "$p:$libraryPath" $1
+    }
+
+    fixRunPath $out/lib/libgpuarray.so
+  '';
+
+  propagatedBuildInputs = [
+    numpy
+    six
+    Mako
+  ];
+
+  enableParallelBuilding = true;
+
+  buildInputs = [ 
+    cmake 
+    cython 
+    nose
+  ]; 
+
+  meta = with stdenv.lib; {
+    homepage = "https://github.com/Theano/libgpuarray";
+    description = "Library to manipulate tensors on GPU.";
+    license = licenses.free;
+    maintainers = with maintainers; [ artuuge ];
+    platforms = platforms.linux;
+  };
+
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 01dd85a671e..a290783fe7d 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1577,27 +1577,19 @@ with pkgs;
     cudatoolkit65
     cudatoolkit7
     cudatoolkit75
-    cudatoolkit8;
+    cudatoolkit8
+    cudatoolkit9;
 
-  cudatoolkit = cudatoolkit8;
+  cudatoolkit = cudatoolkit9;
 
-  cudnn = callPackage ../development/libraries/science/math/cudnn/default.nix {};
+  inherit (callPackages ../development/libraries/science/math/cudnn { })
+    cudnn_cudatoolkit7
+    cudnn_cudatoolkit75
+    cudnn6_cudatoolkit8
+    cudnn_cudatoolkit8
+    cudnn_cudatoolkit9;
 
-  cudnn5_cudatoolkit75 = callPackage ../development/libraries/science/math/cudnn/7.5-5.0 {
-    cudatoolkit = cudatoolkit75;
-  };
-
-  cudnn5_cudatoolkit80 = callPackage ../development/libraries/science/math/cudnn/8.0-5.0 {
-    cudatoolkit = cudatoolkit8;
-  };
-
-  cudnn51_cudatoolkit80 = callPackage ../development/libraries/science/math/cudnn/8.0-5.1 {
-    cudatoolkit = cudatoolkit8;
-  };
-
-  cudnn60_cudatoolkit80 = callPackage ../development/libraries/science/math/cudnn/8.0-6.0 {
-    cudatoolkit = cudatoolkit8;
-  };
+  cudnn = cudnn_cudatoolkit9;
 
   curlFull = curl.override {
     idnSupport = true;
@@ -10033,6 +10025,8 @@ 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;
   };
 
@@ -10095,7 +10089,7 @@ with pkgs;
   };
 
   opensubdiv = callPackage ../development/libraries/opensubdiv {
-    stdenv_gcc5 = overrideCC stdenv gcc5;
+    cudaSupport = config.cudaSupport or false;
     cmake = cmake_2_8;
   };
 
@@ -13832,7 +13826,7 @@ with pkgs;
   bleachbit = callPackage ../applications/misc/bleachbit { };
 
   blender = callPackage  ../applications/misc/blender {
-    stdenv_gcc5 = overrideCC stdenv gcc5;
+    cudaSupport = config.cudaSupport or false;
     python = python35;
   };
 
@@ -18365,10 +18359,7 @@ with pkgs;
 
   blas = callPackage ../development/libraries/science/math/blas { };
 
-  clblas-cuda = callPackage ../development/libraries/science/math/clblas/cuda {
-    cudatoolkit = pkgs.cudatoolkit75;
-    inherit (linuxPackages) nvidia_x11;
-  };
+  clblas = callPackage ../development/libraries/science/math/clblas { };
 
   jags = callPackage ../applications/science/math/jags { };
 
@@ -18750,8 +18741,7 @@ with pkgs;
 
   caffe = callPackage ../applications/science/math/caffe rec {
     cudaSupport = config.caffe.cudaSupport or config.cudaSupport or false;
-    # CUDA 8 doesn't support GCC 6.
-    stdenv = if cudaSupport then overrideCC pkgs.stdenv gcc5 else pkgs.stdenv;
+    cudnnSupport = cudaSupport;
   };
 
   ecm = callPackage ../applications/science/math/ecm { };
@@ -18775,7 +18765,9 @@ with pkgs;
     sbcl = null;
   };
 
-  mxnet = callPackage ../applications/science/math/mxnet {
+  mxnet = callPackage ../applications/science/math/mxnet rec {
+    cudaSupport = config.cudaSupport or false;
+    cudnnSupport = cudaSupport;
     inherit (linuxPackages) nvidia_x11;
   };
 
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index efa21bf121e..a084abf9bed 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -11129,14 +11129,12 @@ in {
     };
   });
 
-  libgpuarray-cuda = callPackage ../development/python-modules/libgpuarray/cuda/default.nix rec {
-    inherit (self) numpy scipy;
-    inherit (pkgs.linuxPackages) nvidia_x11;
-    cudatoolkit = pkgs.cudatoolkit75;
-    clblas = pkgs.clblas-cuda;
+  libgpuarray = callPackage ../development/python-modules/libgpuarray {
+    clblas = pkgs.clblas.override { boost = self.boost; };
+    cudaSupport = pkgs.config.cudaSupport or false;
   };
 
-  libnacl = callPackage ../development/python-modules/libnacl/default.nix {
+  libnacl = callPackage ../development/python-modules/libnacl {
     inherit (pkgs) libsodium;
   };
 
@@ -19835,24 +19833,20 @@ in {
 
   stevedore = callPackage ../development/python-modules/stevedore {};
 
-  Theano = self.TheanoWithoutCuda;
+  Theano = callPackage ../development/python-modules/Theano rec {
+    cudaSupport = pkgs.config.cudaSupport or false;
+    cudnnSupport = cudaSupport;
+  };
 
-  TheanoWithoutCuda = callPackage ../development/python-modules/Theano/theano-without-cuda { };
+  TheanoWithoutCuda = self.Theano.override {
+    cudaSupport = true;
+    cudnnSupport = true;
+  };
 
-  TheanoWithCuda = callPackage ../development/python-modules/Theano/theano-with-cuda (
-  let
-    boost = pkgs.boost159.override {
-      inherit (self) python numpy scipy;
-    };
-  in rec {
-    cudatoolkit = pkgs.cudatoolkit75;
-    cudnn = pkgs.cudnn5_cudatoolkit75;
-    inherit (self) numpy scipy;
-    pycuda = self.pycuda.override { inherit boost; };
-    libgpuarray = self.libgpuarray-cuda.override {
-      clblas = pkgs.clblas-cuda.override { inherit boost; };
-    };
-  });
+  TheanoWithCuda = self.Theano.override {
+    cudaSupport = false;
+    cudnnSupport = false;
+  };
 
   tidylib = buildPythonPackage rec {
     version = "0.2.4";
@@ -25980,14 +25974,16 @@ EOF
 
   tensorflow-tensorboard = callPackage ../development/python-modules/tensorflow-tensorboard { };
 
-  tensorflow = self.tensorflowWithoutCuda;
+  tensorflow = callPackage ../development/python-modules/tensorflow {
+    cudaSupport = pkgs.config.cudaSupport or false;
+  };
 
-  tensorflowWithoutCuda = callPackage ../development/python-modules/tensorflow { };
+  tensorflowWithoutCuda = self.tensorflow.override {
+    cudaSupport = false;
+  };
 
-  tensorflowWithCuda = callPackage ../development/python-modules/tensorflow {
+  tensorflowWithCuda = self.tensorflow.override {
     cudaSupport = true;
-    cudatoolkit = pkgs.cudatoolkit8;
-    cudnn = pkgs.cudnn60_cudatoolkit80;
   };
 
   tflearn = buildPythonPackage rec {