diff --git a/env b/env
index 45243595..57e4de24 100644
--- a/env
+++ b/env
@@ -6,9 +6,9 @@ export ANDROID_TOOL_PREFIX="${BASE}/build-tools"
 export ANDROID_TEST_PREFIX="${BASE}/build-vm"
 
 # SDKs and target platforms.
-export NDK_REL=android-ndk-r10d
+export NDK_REL=android-ndk-r13b
 export SDK_REL=android-sdk-r24.0.2
-export NDK_REV=10d
+export NDK_REV=13b
 export SDK_REV=24.0.2
 export ANDROID_API_LEVEL=21
 export ANDROID_PLATFORM=arm
diff --git a/mk/build_ndk.sh b/mk/build_ndk.sh
index cbc953c3..f733b021 100755
--- a/mk/build_ndk.sh
+++ b/mk/build_ndk.sh
@@ -30,6 +30,15 @@ case "${NDK_REV}" in
            popd
       fi
       ;;
+  13*)
+      NDK_ARCHIVE="$BASE/sdk/android-ndk-r${NDK_REV}-$(uname -s | tr '[A-Z]' '[a-z]')-${NDK_ARCH}.zip"
+      if [[ ! -d "${BASE}/sdk/${NDK_REL}" ]]; then
+           # Zip archive.
+	   pushd "${BASE}/sdk"
+           unzip "${NDK_ARCHIVE}" || exit 1
+	   popd
+      fi
+      ;;
   *)
       NDK_ARCHIVE="$BASE/sdk/android-ndk-r${NDK_REV}-$(uname -s | tr '[A-Z]' '[a-z]')-${NDK_ARCH}.tar.bz2"
       if [[ ! -d "${BASE}/sdk/${NDK_REL}" ]]; then
@@ -40,6 +49,6 @@ case "${NDK_REV}" in
 esac
 
 if [[ ! -f "${ANDROID_PREFIX}/.built-ndk-${BUILD_IDENTIFIER}" ]]; then
-    ("${BASE}/sdk/${NDK_REL}/build/tools/make-standalone-toolchain.sh" --platform="android-${ANDROID_API_LEVEL}" --install-dir="${ANDROID_TOOL_PREFIX}/${BUILD_IDENTIFIER}" --toolchain="${ANDROID_TOOLCHAIN}" &&\
+    ("${BASE}/sdk/${NDK_REL}/build/tools/make-standalone-toolchain.sh" --force --platform="android-${ANDROID_API_LEVEL}" --install-dir="${ANDROID_TOOL_PREFIX}/${BUILD_IDENTIFIER}" --toolchain="${ANDROID_TOOLCHAIN}" &&\
      touch "${ANDROID_PREFIX}/.built-ndk-${BUILD_IDENTIFIER}") || exit 1
 fi
diff --git a/mk/ndk_source.sh b/mk/ndk_source.sh
index 9728d983..340cbda9 100644
--- a/mk/ndk_source.sh
+++ b/mk/ndk_source.sh
@@ -15,13 +15,25 @@ case $(uname -m) in
       ;;
 esac
 
+# NOTE: For newer is seems that we require to unzip
 case "${NDK_REV}" in
   10*)
       NDK_EXT=bin
       ;;
+  13*)
+      NDK_EXT=zip
+      ;;
   *)
       NDK_EXT=tar.bz2
       ;;
 esac
 
-echo http://dl.google.com/android/ndk/android-ndk-r${NDK_REV}-$(uname -s | tr '[A-Z]' '[a-z'])-${NDK_ARCH}.${NDK_EXT}
+
+case "${NDK_EXT}" in
+  zip)
+	echo http://dl.google.com/android/repository//android-ndk-r${NDK_REV}-$(uname -s | tr '[A-Z]' '[a-z'])-${NDK_ARCH}.${NDK_EXT}
+	;;
+  *)
+	echo http://dl.google.com/android/ndk/android-ndk-r${NDK_REV}-$(uname -s | tr '[A-Z]' '[a-z'])-${NDK_ARCH}.${NDK_EXT}
+	;;
+esac