diff --git a/pkgs/applications/misc/blender/default.nix b/pkgs/applications/misc/blender/default.nix
index 734364b9ccda..e07fa1df5464 100644
--- a/pkgs/applications/misc/blender/default.nix
+++ b/pkgs/applications/misc/blender/default.nix
@@ -11,11 +11,11 @@
 with lib;
 
 stdenv.mkDerivation rec {
-  name = "blender-2.78";
+  name = "blender-2.78a";
 
   src = fetchurl {
     url = "http://download.blender.org/source/${name}.tar.gz";
-    sha256 = "0hfl7q6phydlk8mbkksnqxj004qqad99xkrp5n9wrz9vrcf3x1hp";
+    sha256 = "1byf1klrvm8fdw2libx7wldz2i6lblp9nih6y58ydh00paqi8jh1";
   };
 
   buildInputs =
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ee627a0deb04..24b85eff7ee5 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8701,7 +8701,7 @@ in
   };
 
   opensubdiv = callPackage ../development/libraries/opensubdiv {
-    cudatoolkit = cudatoolkit75;
+    cudatoolkit = cudatoolkit8;
   };
 
   openwsman = callPackage ../development/libraries/openwsman {};
@@ -12168,7 +12168,7 @@ in
   bleachbit = callPackage ../applications/misc/bleachbit { };
 
   blender = callPackage  ../applications/misc/blender {
-    cudatoolkit = cudatoolkit75;
+    cudatoolkit = cudatoolkit8;
     python = python35;
   };