diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index bea2994..064591a 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -21,6 +21,14 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      # --- Lower MTU to prevent packet drops on large Nix layers ---
+      - name: Adjust MTU to fix Docker push timeouts
+        run: |
+          # Find the active network interface and lower its MTU
+          INTERFACE=$(ip route | grep default | awk '{print $5}')
+          echo "Lowering MTU on interface: $INTERFACE"
+          sudo ip link set dev $INTERFACE mtu 1400
+
       # Gitea Actions automatically provides a token that can push to its own registry
       - name: Log in to the Container registry
         uses: docker/login-action@v3