title: ungoogled-chromium-windows build fails with "fatal error: 'atlsecurity.h' file not found"
body: <p>I've been trying to build ungoogled-chromium-windows using their build.py file. Unfortunately, during processing of about 40,000 files, it crashes after around 11,000. This is the command that the build file runs and ultimately fails:</p>
  <pre><code>&quot;third_party\ninja\ninja.exe&quot; &quot;-C&quot; &quot;out\Default&quot; &quot;chrome&quot; &quot;chromedriver&quot; &quot;mini_installer&quot;
  ninja: Entering directory `out\Default'
  [11350/41090] CXX obj/chrome/elevation_service/lib/service_main.obj
  FAILED: obj/chrome/elevation_service/lib/service_main.obj
  </code></pre>
  <p>But the main issue seems to come from its inability to locate atlsecurity.h file, which from what I understand should be in some of the Windows SDK that I downloaded. This is the error it generates:</p>
  <pre><code>../../chrome/elevation_service/service_main.cc(14,10): fatal error: 'atlsecurity.h' file not found
  #include &lt;atlsecurity.h&gt;
           ^~~~~~~~~~~~~~~
  1 error generated.
  [11367/41090] CXX obj/components/dom_distiller/core/proto/proto/distilled_page.pb.obj
  ninja: build stopped: subcommand failed.
  
  C:\Users\Carlos\Desktop\Work\Projects\ungoogled-chromium-windows\build\src&gt;exit
  Traceback (most recent call last):
    File &quot;build.py&quot;, line 221, in &lt;module&gt;
      main()
    File &quot;build.py&quot;, line 216, in main
      _run_build_process('third_party\\ninja\\ninja.exe', '-C', 'out\\Default', 'chrome',
    File &quot;build.py&quot;, line 64, in _run_build_process
      subprocess.run(('cmd.exe', '/k'),
    File &quot;C:\depot_tools\bootstrap-3_8_0_chromium_8_bin\python3\bin\lib\subprocess.py&quot;, line 512, in run
      raise CalledProcessError(retcode, process.args,
  subprocess.CalledProcessError: Command '('cmd.exe', '/k')' returned non-zero exit status 1.
  </code></pre>
  <p>I thought MinGW was causing an issue with the ninja command but nothing seems to let me get further than this step so far. Let me know if I can give any more information to aid. This is the github for the chromium build I'm using: <a href="https://github.com/ungoogled-software/ungoogled-chromium-windows" rel="nofollow noreferrer">https://github.com/ungoogled-software/ungoogled-chromium-windows</a></p>