diff --git a/setup-opencode/action.yml b/setup-opencode/action.yml
index c4b8da1..49813b7 100644
--- a/setup-opencode/action.yml
+++ b/setup-opencode/action.yml
@@ -160,12 +160,20 @@ runs:
       run: |
         PACKAGE="${{ inputs.package-name }}"
         TARGET_VERSION="${{ steps.resolve-version.outputs.version }}"
+        GLOBAL_ROOT="${{ steps.npm-paths.outputs.global-root }}"
         NEED_INSTALL="true"
         
-        if command -v $PACKAGE &> /dev/null; then
-          # 使用 JSON 格式获取版本信息，更可靠
-          INSTALLED_INFO=$(npm list -g $PACKAGE --json --depth=0 2>/dev/null || echo '{}')
-          INSTALLED_VERSION=$(echo "${INSTALLED_INFO}" | grep -o '"version":"[^"]*"' | head -1 | cut -d'"' -f4 || echo "unknown")
+        # 检查包目录是否存在（更可靠，不依赖命令名）
+        PACKAGE_DIR="${GLOBAL_ROOT}/${PACKAGE}"
+        
+        if [[ -d "${PACKAGE_DIR}" ]]; then
+          # 从 package.json 获取版本
+          PACKAGE_JSON="${PACKAGE_DIR}/package.json"
+          if [[ -f "${PACKAGE_JSON}" ]]; then
+            INSTALLED_VERSION=$(grep -o '"version"[[:space:]]*:[[:space:]]*"[^"]*"' "${PACKAGE_JSON}" | head -1 | cut -d'"' -f4 || echo "unknown")
+          else
+            INSTALLED_VERSION="unknown"
+          fi
           
           echo "📦 已安装版本: ${INSTALLED_VERSION}"
           echo "🎯 目标版本: ${TARGET_VERSION}"