I don't know how the .html files that are included in dmd.zip are generated. Please try and see if it works for you. If not, I can look into it if you open-source your process.
https://github.com/D-Programming-Language/installer/blob/4d57e861a2b15767f5e004b74a4578205dc03e3e/create_dmd_release/create_dmd_release.d#L784
Not sure if anyone is actually using those HTML files.
