update CI

.github/workflows/build.yml

@@ -17,10 +17,15 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install dependencies
-        run: pacman -Syu --noconfirm base-devel rust
+        run: |
+          pacman -Syu --noconfirm base-devel rust
+          useradd builder -m -G wheel
+          echo 'builder ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
 
       - name: Build Arch package
-        run: makepkg -sf --noconfirm
+        run: |
+          chown -R builder:builder .
+          sudo -u builder bash -c "makepkg -sf --noconfirm"
 
       - name: Upload Arch package
         uses: actions/upload-artifact@v2