diff --git a/pkgs/development/libraries/vxl/default.nix b/pkgs/development/libraries/vxl/default.nix
index c9ba078a6fa..01ccb23b77c 100644
--- a/pkgs/development/libraries/vxl/default.nix
+++ b/pkgs/development/libraries/vxl/default.nix
@@ -9,11 +9,12 @@ stdenv.mkDerivation {
 
   buildInputs = [ cmake unzip libtiff expat zlib libpng libjpeg ];
 
-  cmakeFlags = if (stdenv.system == "x86_64-linux") then
+  cmakeFlags = "-DBUILD_TESTING=OFF " + (if (stdenv.system == "x86_64-linux") then
       "-DCMAKE_CXX_FLAGS=-fPIC -DCMAKE_C_FLAGS=-fPIC"
     else
-      "";
-    
+      "");
+
+  enableParallelBuilding = true;
 
   meta = {
     description = "C++ Libraries for Computer Vision Research and Implementation";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7286ef37b89..6c810d1f433 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4728,7 +4728,9 @@ let
 
   vtk = callPackage ../development/libraries/vtk { };
 
-  vxl = callPackage ../development/libraries/vxl { };
+  vxl = callPackage ../development/libraries/vxl {
+    libpng = libpng12;
+  };
 
   webkit =
     builderDefsPackage ../development/libraries/webkit {