<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/84842>84842</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Pre-commit CI's Linux x64 job is missing the argument to `ninja -C`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            infrastructure
      </td>
    </tr>

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

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

<pre>
    In the last pre-commit CI run for https://github.com/llvm/llvm-project/pull/84595 which was https://buildkite.com/llvm-project/github-pull-requests/builds/46244#018e2f7a-1684-4ea5-8e87-2316586da218 the Linux x64 build failed with a broken ninja command:
```
+ ninja -C -k 0 /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-zw2hg-1/llvm-project/github-pull-requests/build check-bolt check-clang check-clang-tools check-flang check-lld check-llvm check-mlir check-polly
ninja: Entering directory `-k'
ninja: fatal: chdir to '-k' - No such file or directory
```
The argument to -C is missing causing it to treat the -k as the directory. This didn't happen on the run from a 3 days ago before I rebased today.
</pre>
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