Unbrick Windows Doc PDF builds by removing l3backend from the preinstall package list

[jmarrec]

Pull request overview

doc: remove l3backend from Windows MiKTeX package list (merged in l3kernel)

https://www.ctan.org/ctan-ann/id/b6ae11eda9580e94@hogwart

Date: August 18, 2026 1:29:37 PM CEST
The LaTeX Project Team submitted an update to the

                l3kernel

package.

Version: 2026-08-10
License: lppl1.3c

Summary description: LaTeX3 programming conventions

Announcement text:## [2026-08-10]

### Changed

- Integrate `l3backend` files into `l3kernel` distribution

MiKTeX's CTAN mirror no longer serves l3backend as a standalone package (merged into l3kernel upstream), so mpm --require was failing outright with "The requested package is unknown". Since mpm aborts the whole batch on an unknown package, none of the listed packages (including xkeyval) got pre-installed, causing the PDF doc build to fail with "File xkeyval.sty not found".

Pull Request Author

• Title of PR should be user-synopsis style (clearly understandable in a standalone changelog context)
• Label the PR with at least one of: Defect, Refactoring, NewFeature, Performance, and/or DoNoPublish
• Pull requests that impact EnergyPlus code must also include unit tests to cover enhancement or defect repair
• Author should provide a "walkthrough" of relevant code changes using a GitHub code review comment process
• If any diffs are expected, author must demonstrate they are justified using plots and descriptions
• If changes fix a defect, the fix should be demonstrated in plots and descriptions
• If any defect files are updated to a more recent version, upload new versions here or on DevSupport
• If IDD requires transition, transition source, rules, ExpandObjects, and IDFs must be updated, and add IDDChange label
• If structural output changes, add to output rules file and add OutputChange label
• If adding/removing any LaTeX docs or figures, update that document's CMakeLists file dependencies
• If adding/removing any output files (e.g., eplustbl.*)
  • Update ..\scripts\Epl-run.bat
  • Update ..\scripts\RunEPlus.bat
  • Update ..\src\EPLaunch\ MainModule.bas, epl-ui.frm, and epl.vbp (VersionComments)
  • Update ...github\workflows\energyplus.py

Reviewer

• Perform a Code Review on GitHub
• If branch is behind develop, merge develop and build locally to check for side effects of the merge
• If defect, verify by running develop branch and reproducing defect, then running PR and reproducing fix
• If feature, test running new feature, try creative ways to break it
• CI status: all green or justified
• Check that performance is not impacted (CI Linux results include performance check)
• Run Unit Test(s) locally
• Check any new function arguments for performance impacts
• Verify IDF naming conventions and styles, memos and notes and defaults
• If new idf included, locally check the err file and other outputs

[jmarrec]

Alright it built! https://github.com/NatLabRockies/EnergyPlus/actions/runs/33224556502/job/99025494281