diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 395a156..acab96f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -54,10 +54,7 @@ jobs:
             target: ubuntu-22.04_x86_64
             runs_on: ubuntu-22.04
             os: ubuntu
-          - name: ubuntu-24.04_armv8
-            target: ubuntu-24.04_armv8
-            runs_on: ubuntu-24.04
-            os: ubuntu
+            arch: x86_64
           - name: macos-13_arm64
             target: macos_arm64
             runs_on: macos-13
@@ -80,6 +77,7 @@ jobs:
               target: ubuntu-24.04_armv8
               runs_on: ubuntu-24.04
               os: ubuntu
+              arch: armv8
             python_version: "3.12"
     needs: [build_pyi] 
     runs-on: ${{ matrix.platform.runs_on }}
@@ -97,7 +95,12 @@ jobs:
       - run: |
           sudo apt-get update
           sudo apt-get -y install libva-dev libdrm-dev libx11-dev
-        if: ${{ matrix.platform.os == 'ubuntu' }}
+        if: ${{ matrix.platform.os == 'ubuntu' && matrix.platform.arch == 'x86_64' }}
+      - run: |
+          sudo apt-get -y install multistrap binutils-aarch64-linux-gnu
+          # multistrap に insecure なリポジトリからの取得を許可する設定を入れる
+          sudo sed -e 's/Apt::Get::AllowUnauthenticated=true/Apt::Get::AllowUnauthenticated=true";\n$config_str .= " -o Acquire::AllowInsecureRepositories=true/' -i /usr/sbin/multistrap
+        if: ${{ matrix.platform.os == 'ubuntu' && matrix.platform.arch == 'armv8' }}
       - uses: astral-sh/setup-uv@v2
       - run: uv python pin ${{ matrix.python_version }}
       - run: uv sync