diff --git a/.github/workflows/PR_All_envs.yml b/.github/workflows/PR_All_envs.yml
index e5cdbe9da..b0ca3f689 100644
--- a/.github/workflows/PR_All_envs.yml
+++ b/.github/workflows/PR_All_envs.yml
@@ -75,6 +75,11 @@ jobs:
         with:
           python-version: "3.13"
 
+      - name: Install build deps (multilib)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends gcc-multilib libc6-dev-i386
+
       # - name: Cache pip
       #   uses: actions/cache@v4
       #   with:
diff --git a/.github/workflows/PR_check.yml b/.github/workflows/PR_check.yml
index 45c4aaeb8..f3582d944 100644
--- a/.github/workflows/PR_check.yml
+++ b/.github/workflows/PR_check.yml
@@ -61,6 +61,11 @@ jobs:
         with:
           python-version: "3.13"
 
+      - name: Install build deps (multilib)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends gcc-multilib libc6-dev-i386
+
       # - name: Cache pip
       #   uses: actions/cache@v4
       #   with:
diff --git a/.github/workflows/buil_parallel.yml b/.github/workflows/buil_parallel.yml
index 2d9bb1e61..f85a04e0d 100644
--- a/.github/workflows/buil_parallel.yml
+++ b/.github/workflows/buil_parallel.yml
@@ -75,6 +75,11 @@ jobs:
         with:
           python-version: "3.13"
 
+      - name: Install build deps (multilib)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends gcc-multilib libc6-dev-i386
+
       - name: Cache pip
         uses: actions/cache@v4
         with: