diff --git a/.github/workflows/ubuntu-cpu-wheels.yml b/.github/workflows/ubuntu-cpu-wheels.yml
index 69e1b5f..3a1bc6c 100644
--- a/.github/workflows/ubuntu-cpu-wheels.yml
+++ b/.github/workflows/ubuntu-cpu-wheels.yml
@@ -2,6 +2,8 @@ name: build-wheels-cpu-ubuntu
 
 on:
   push:
+    branches:
+      - wheels
     tags:
       - '*'
   workflow_dispatch:
@@ -92,19 +94,20 @@ jobs:
       # https://huggingface.co/docs/hub/spaces-github-actions
       - name: Publish to huggingface
         if: github.repository_owner == 'csukuangfj'
-        shell: bash
         env:
           HF_TOKEN: ${{ secrets.HF_TOKEN }}
-        run: |
-          git config --global user.email "csukuangfj@gmail.com"
-          git config --global user.name "Fangjun Kuang"
+        uses: nick-fields/retry@v2
+        with:
+          max_attempts: 10
+          timeout_seconds: 10
+          shell: bash
+          command: |
+            git config --global user.email "csukuangfj@gmail.com"
+            git config --global user.name "Fangjun Kuang"
 
-          export GIT_LFS_SKIP_SMUDGE=1
-          git clone https://huggingface.co/csukuangfj/kaldifeat huggingface
-          cur_path=$PWD
+            export GIT_LFS_SKIP_SMUDGE=1
+            git clone https://huggingface.co/csukuangfj/kaldifeat huggingface
 
-          function push_to_huggingface() {
-            cd $cur_path
             rm -rf huggingface
             git clone https://huggingface.co/csukuangfj/kaldifeat huggingface
             cd huggingface
@@ -117,12 +120,3 @@ jobs:
             git add .
             git commit -m "upload ubuntu-cpu wheel for torch ${{ matrix.torch }} python ${{ matrix.python-version }}"
             git push https://csukuangfj:$HF_TOKEN@huggingface.co/csukuangfj/kaldifeat main
-
-            cd ..
-            rm -rf huggingface
-          }
-          function retry() {
-            $* || (sleep 1 && $*) || (sleep 2 && $*) || (sleep 4 && $*) || (sleep 8 && $*)
-          }
-
-          retry push_to_huggingface
diff --git a/scripts/github_actions/build-ubuntu-cpu.sh b/scripts/github_actions/build-ubuntu-cpu.sh
index b4f8af9..1b44dcc 100755
--- a/scripts/github_actions/build-ubuntu-cpu.sh
+++ b/scripts/github_actions/build-ubuntu-cpu.sh
@@ -15,20 +15,13 @@ if [ -z $TORCH_VERSION ]; then
   exit 1
 fi
 
-echo "Installing ${PYTHON_VERSION}.1"
-
 yum -y install openssl-devel bzip2-devel libffi-devel xz-devel wget redhat-lsb-core
 
+echo "Installing ${PYTHON_VERSION}.3"
 
-if [[ $PYTHON_VERSION == 3.6 ]]; then
-  curl -O https://www.python.org/ftp/python/${PYTHON_VERSION}.1/Python-${PYTHON_VERSION}.1.tgz
-  tar xf Python-${PYTHON_VERSION}.1.tgz
-  pushd Python-${PYTHON_VERSION}.1
-else
-  curl -O https://www.python.org/ftp/python/${PYTHON_VERSION}.9/Python-${PYTHON_VERSION}.1.tgz
-  tar xf Python-${PYTHON_VERSION}.9.tgz
-  pushd Python-${PYTHON_VERSION}.9
-fi
+curl -O https://www.python.org/ftp/python/${PYTHON_VERSION}.3/Python-${PYTHON_VERSION}.3.tgz
+tar xf Python-${PYTHON_VERSION}.3.tgz
+pushd Python-${PYTHON_VERSION}.3
 
 PYTHON_INSTALL_DIR=$PWD/py-${PYTHON_VERSION}