diff --git a/scripts/build-linux-deb-all.sh b/scripts/build-linux-deb-all.sh
index 9e72855..081c46f 100644
--- a/scripts/build-linux-deb-all.sh
+++ b/scripts/build-linux-deb-all.sh
@@ -31,6 +31,35 @@ OUTPUT_ROOT="$REPO_ROOT/dist/linux-deb"
 
 # aarch64 交叉编译时 pkg-config 查找路径（与下方 export 一致）
 ARM64_PKGCONFIG_DIR="/usr/lib/aarch64-linux-gnu/pkgconfig"
+X64_PKGCONFIG_DIR="/usr/lib/x86_64-linux-gnu/pkgconfig"
+
+check_x64_pkgconfig() {
+  local missing=()
+  local f
+  for f in glib-2.0.pc gdk-3.0.pc webkit2gtk-4.1.pc; do
+    if [[ ! -f "$X64_PKGCONFIG_DIR/$f" ]]; then
+      missing+=( "$f" )
+    fi
+  done
+  if (( ${#missing[@]} == 0 )); then
+    return 0
+  fi
+
+  cat >&2 <<EOF
+错误: amd64 缺少 pkg-config 文件（在 $X64_PKGCONFIG_DIR）:
+      ${missing[*]}
+
+请先安装本机 amd64 的开发包：
+  sudo apt install -y --no-install-recommends \\
+    libglib2.0-dev libgtk-3-dev \\
+    libwebkit2gtk-4.1-dev libjavascriptcoregtk-4.1-dev \\
+    libayatana-appindicator3-dev librsvg2-dev libssl-dev
+
+安装后自检：
+  ls $X64_PKGCONFIG_DIR/glib-2.0.pc $X64_PKGCONFIG_DIR/gdk-3.0.pc $X64_PKGCONFIG_DIR/webkit2gtk-4.1.pc
+EOF
+  exit 1
+}
 
 check_arm64_pkgconfig() {
   # 缺任一则 cargo 会在不同阶段失败；gdk-3.0.pc 由 libgtk-3-dev:arm64 提供
@@ -116,8 +145,12 @@ build_project() {
   echo ""
   echo "######## $project_dir: amd64 ########"
   unset PKG_CONFIG_PATH PKG_CONFIG_LIBDIR PKG_CONFIG_SYSROOT_DIR PKG_CONFIG_ALLOW_CROSS 2>/dev/null || true
+  check_x64_pkgconfig
+  export PKG_CONFIG_PATH="$X64_PKGCONFIG_DIR"
+  export PKG_CONFIG_LIBDIR="$X64_PKGCONFIG_DIR:/usr/share/pkgconfig"
   build_one_target "$project_dir" "build:deb:x64"
   collect_debs "$project_dir" "amd64" "x86_64-unknown-linux-gnu"
+  unset PKG_CONFIG_PATH PKG_CONFIG_LIBDIR
 
   echo ""
   echo "######## $project_dir: arm64 (cross) ########"