diff --git a/doc/howto/dev/build_cn.md b/doc/howto/dev/build_cn.md
index 79b4ff9d5a6fde88daead2ee3b111fc10756cffa..d9d520893f726e1bc9c99cd7a854db59c6f60480 100644
--- a/doc/howto/dev/build_cn.md
+++ b/doc/howto/dev/build_cn.md
@@ -56,7 +56,15 @@
    有时候我们只想运行一个特定的单元测试，比如 `memory_test`，我们可以
 
    ```bash
-   docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   nvidia-docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   ```
+
+5. 清理
+
+   有时候我们会希望清理掉已经下载的第三方依赖以及已经编译的二进制文件。此时只需要：
+
+   ```bash
+   rm -rf build
    ```
 
 ## 为什么要 Docker 呀？
diff --git a/doc/howto/dev/build_en.md b/doc/howto/dev/build_en.md
index e1b55929f9685b5ac6ed6d8dbbac431ac3cc6392..318bf3d38415c216c19fe41fb9610eaabd83659c 100644
--- a/doc/howto/dev/build_en.md
+++ b/doc/howto/dev/build_en.md
@@ -56,7 +56,15 @@ Nothing else.  Not even Python and GCC, because you can install all build tools
    Sometimes we want to run a specific unit test, say `memory_test`, we can run
 
    ```bash
-   docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   nvidia-docker run -v $PWD:/paddle paddle:dev bash -c "cd /paddle/build; ctest -V -R memory_test"
+   ```
+
+5. Clean Build.
+
+   Sometimes, we might want to clean all thirt-party dependents and built binaries.  To do so, just
+
+   ```bash
+   rm -rf build
    ```
 
 ## Docker, Or Not?