diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index 8d3031d8377..9262d369a88 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -37,6 +37,7 @@ jobs:
       NCNN_CMAKE_OPTIONS: |
         -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_LATEST_HOME/build/cmake/android.toolchain.cmake \
         -DANDROID_PLATFORM=android-21 \
+        -DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
         -DCMAKE_INSTALL_PREFIX=install \
         -DCMAKE_BUILD_TYPE=Release \
         -DNCNN_VULKAN=ON \
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9351066e4a5..dd26b5d8e9b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -1916,14 +1916,15 @@ jobs:
       PACKAGENAME: ncnn-${{ needs.setup.outputs.VERSION }}-${{ matrix.opt.id }}
       NCNN_CMAKE_OPTIONS: |
         -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_LATEST_HOME/build/cmake/android.toolchain.cmake \
+        -DANDROID_PLATFORM=android-21 \
         -DANDROID_USE_LEGACY_TOOLCHAIN_FILE=False \
+        -DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
         -DCMAKE_BUILD_TYPE=Release \
         -DCMAKE_INSTALL_PREFIX=install \
         -DNCNN_VERSION_STRING="${{ needs.setup.outputs.VERSION }}" \
         -DNCNN_BUILD_BENCHMARK=OFF \
         -DNCNN_VULKAN=${{ matrix.opt.vulkan }} \
         -DNCNN_SHARED_LIB=${{ matrix.opt.shared-lib }} \
-        -DNCNN_AVX512BF16=OFF \
 
     steps:
     - uses: actions/checkout@v4
@@ -1934,25 +1935,31 @@ jobs:
     - name: build-armeabi-v7a
       run: |
         mkdir build-armeabi-v7a && cd build-armeabi-v7a
-        cmake ${{ env.NCNN_CMAKE_OPTIONS }} -DANDROID_ABI="armeabi-v7a" -DANDROID_ARM_NEON=ON -DANDROID_PLATFORM=android-14 ..
+        cmake ${{ env.NCNN_CMAKE_OPTIONS }} -DANDROID_ABI="armeabi-v7a" -DANDROID_ARM_NEON=ON ..
         cmake --build . -j $(nproc)
         cmake --build . --target install/strip
     - name: build-arm64-v8a
       run: |
         mkdir build-arm64-v8a && cd build-arm64-v8a
-        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="arm64-v8a" -DANDROID_PLATFORM=android-21 ..
+        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="arm64-v8a" ..
         cmake --build . -j $(nproc)
         cmake --build . --target install/strip
     - name: build-x86
       run: |
         mkdir build-x86 && cd build-x86
-        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="x86" -DANDROID_PLATFORM=android-14 ..
+        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="x86" ..
         cmake --build . -j $(nproc)
         cmake --build . --target install/strip
     - name: build-x86_64
       run: |
         mkdir build-x86_64 && cd build-x86_64
-        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="x86_64" -DANDROID_PLATFORM=android-21 ..
+        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="x86_64" ..
+        cmake --build . -j $(nproc)
+        cmake --build . --target install/strip
+    - name: build-riscv64
+      run: |
+        mkdir build-riscv64 && cd build-riscv64
+        cmake ${{ env.NCNN_CMAKE_OPTIONS }}-DANDROID_ABI="riscv64" ..
         cmake --build . -j $(nproc)
         cmake --build . --target install/strip
     - name: package
@@ -1963,6 +1970,7 @@ jobs:
         cp -a build-arm64-v8a/install ${{ env.PACKAGENAME }}/arm64-v8a
         cp -a build-x86/install ${{ env.PACKAGENAME }}/x86
         cp -a build-x86_64/install ${{ env.PACKAGENAME }}/x86_64
+        cp -a build-riscv64/install ${{ env.PACKAGENAME }}/riscv64
         rm -f ${{ env.PACKAGENAME }}.zip
         zip -9 -y -r ${{ env.PACKAGENAME }}.zip ${{ env.PACKAGENAME }}
     - name: upload-zip