diff --git a/setup_build_server.sh b/setup_build_server.sh
index 646b26c..c61a7d5 100755
--- a/setup_build_server.sh
+++ b/setup_build_server.sh
@@ -66,48 +66,35 @@ pip install --upgrade pip
 # -----------------------------
 # nDPI installieren (system lib + python bindings)
 # -----------------------------
+NDPIDIR="/tmp/nDPI"
+
 if ! ldconfig -p | grep -q "libndpi"; then
     echo "==> Build and install nDPI library"
-    NDPIDIR="/tmp/nDPI"
     rm -rf "$NDPIDIR"
     git clone --depth 1 https://github.com/ntop/nDPI.git "$NDPIDIR"
     cd "$NDPIDIR"
     ./autogen.sh
-    ./configure --prefix=/usr
+    ./configure
     make -j"$(nproc)"
     make install
     ldconfig
 else
     echo "==> nDPI library already installed"
+    # Keep python bindings source in sync with official instructions.
+    if [ ! -d "$NDPIDIR/python" ]; then
+        rm -rf "$NDPIDIR"
+        git clone --depth 1 https://github.com/ntop/nDPI.git "$NDPIDIR"
+    fi
 fi
 
-patch_ndpi_python_metadata() {
-    local py_dir="$1"
-    local patched=0
-    if [ -f "$py_dir/pyproject.toml" ] && grep -q "PACK_ON" "$py_dir/pyproject.toml"; then
-        sed -i 's/PACK_ON/"0.0.0"/g' "$py_dir/pyproject.toml"
-        patched=1
-    fi
-    if [ -f "$py_dir/setup.cfg" ] && grep -q "PACK_ON" "$py_dir/setup.cfg"; then
-        sed -i 's/PACK_ON/0.0.0/g' "$py_dir/setup.cfg"
-        patched=1
-    fi
-    if [ -f "$py_dir/setup.py" ] && grep -q "PACK_ON" "$py_dir/setup.py"; then
-        sed -i "s/PACK_ON/'0.0.0'/g" "$py_dir/setup.py"
-        patched=1
-    fi
-    if [ "$patched" -eq 1 ]; then
-        echo "==> Applied PACK_ON metadata workaround for nDPI python bindings"
-    fi
-}
-
-if [ -d "/tmp/nDPI/python" ]; then
+if [ -d "$NDPIDIR/python" ]; then
     echo "==> Install nDPI Python bindings"
-    patch_ndpi_python_metadata "/tmp/nDPI/python"
-    # nDPI bindings currently fail with newer build backends on some hosts
-    # (e.g. metadata parsing errors such as "cannot parse PACK_ON").
-    pip install "setuptools<81" "packaging<25" wheel
-    if ! pip install --no-build-isolation /tmp/nDPI/python; then
+    cd "$NDPIDIR/python"
+    python3 -m pip install --upgrade pip
+    if ! python3 -m pip install -r dev_requirements.txt; then
+        echo "==> WARNING: failed to install nDPI python dev_requirements"
+    fi
+    if ! python3 -m pip install .; then
         echo "==> WARNING: nDPI Python bindings install failed, backend will run without DPI enrichment"
     else
         if python - <<'PY'
@@ -129,6 +116,7 @@ PY
             echo "==> WARNING: nDPI installed but import failed in backend venv"
         fi
     fi
+    cd "$BACKEND_DIR"
 fi
 
 cd "$BACKEND_DIR"
@@ -270,10 +258,16 @@ npm run build
 # Backend Dependencies
 cd $BACKEND_DIR
 source venv/bin/activate
+NDPIDIR="/tmp/nDPI"
+if [ ! -d "$NDPIDIR/python" ]; then
+    rm -rf "$NDPIDIR"
+    git clone --branch dev --depth 1 https://github.com/ntop/nDPI.git "$NDPIDIR"
+fi
 if [ -d "/tmp/nDPI/python" ]; then
-    patch_ndpi_python_metadata "/tmp/nDPI/python"
-    pip install "setuptools<81" "packaging<25" wheel
-    if ! pip install --no-build-isolation /tmp/nDPI/python; then
+    cd "$NDPIDIR/python"
+    python3 -m pip install --upgrade pip
+    python3 -m pip install -r dev_requirements.txt || true
+    if ! python3 -m pip install .; then
         echo "WARNING: nDPI Python bindings install failed during runner build"
     else
         python - <<'PY' || echo "WARNING: nDPI import check failed during runner build"
@@ -288,6 +282,7 @@ for name in ("ndpi", "pyndpi"):
 raise SystemExit(1)
 PY
     fi
+    cd $BACKEND_DIR
 fi
 pip install -r requirements.txt
 deactivate