diff --git a/.github/workflows/build-docker-image.yml b/.github/workflows/build-docker-image.yml
index 7c4cacf..ed62227 100644
--- a/.github/workflows/build-docker-image.yml
+++ b/.github/workflows/build-docker-image.yml
@@ -40,7 +40,11 @@ jobs:
             echo "DOCKER_IO=true" >> $GITHUB_ENV
           fi
 
-          echo "PLATFORMS=${{ inputs.platforms }}" >> $GITHUB_ENV
+          if [[ ${{ inputs.eventname }} == 'pull_request' ]]; then
+            echo "PLATFORMS=linux/arm/v6" >> $GITHUB_ENV
+          else
+            echo "PLATFORMS=${{ inputs.platforms }}" >> $GITHUB_ENV
+          fi
       - name: Checkout repository
         uses: actions/checkout@v4
       - name: Set up QEMU
diff --git a/Docker/PlexAniSync/Dockerfile b/Docker/PlexAniSync/Dockerfile
index b31e734..957f251 100644
--- a/Docker/PlexAniSync/Dockerfile
+++ b/Docker/PlexAniSync/Dockerfile
@@ -13,7 +13,10 @@ RUN pip install --upgrade pip
 COPY Docker/PlexAniSync/pip.conf /etc/pip.conf
 COPY requirements.txt .
 # install dependencies to the local user directory (eg. /root/.local)
-RUN pip install --user --no-warn-script-location -r requirements.txt
+RUN --mount=type=tmpfs,target=/root/.cargo \
+    CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse \
+    CARGO_HOME=/root/.cargo \
+    pip install --user --no-warn-script-location -r requirements.txt
 
 FROM python:3.12-slim