<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/123669>123669</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            CMake Error at CMakeLists.txt:3 (cmake_minimum_required):
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          guimvmatos
      </td>
    </tr>
</table>

<pre>
    I'm trying to install LLVM in docker as described [here](https://llvm.org/docs/Docker.html). But after the first command, I get the error below. How can I resolve this?

The command:

```
./llvm/utils/docker/build_docker_image.sh \
    --source debian10 \
    --docker-repository clang-debian10 --docker-tag "staging" \
    -p clang -i install-clang -i install-clang-resource-headers \
 -- \
    -DCMAKE_BUILD_TYPE=Release
```

The output:

```
 > [builder 9/9] RUN /tmp/scripts/build_install_llvm.sh --to /tmp/clang-install  -i install-clang -i install-clang-resource-headers -- -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS=clang:                      
0.394 /tmp/clang-build/build / 
0.394 Running build 
0.591 CMake Error at CMakeLists.txt:3 (cmake_minimum_required): 
0.591   CMake 3.20.0 or higher is required.  You are running version 3.13.4
0.591 
0.591 
0.592 -- Configuring incomplete, errors occurred!
------
Dockerfile:41
--------------------
  39 |     # Run the build. Results of the build will be available at /tmp/clang-install/.
  40 |     ARG buildscript_args
  41 | >>> RUN /tmp/scripts/build_install_llvm.sh --to /tmp/clang-install ${buildscript_args}
  42 |     
  43 |     
--------------------
ERROR: failed to solve: process "/bin/sh -c /tmp/scripts/build_install_llvm.sh --to /tmp/clang-install ${buildscript_args}" did not complete successfully: exit code: 1
```
</pre>
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