It seems that a major part of the problem was that I did not actually launch Visual Studio Community 2015 after installing it. I had already had it installed for a couple months and it required me to now sign in to a Microsoft account in order to continue using it.
I did so and then retried the build process. It's been going for a bit now. I'm definitely past the part that resulted in errors earlier and I have a handful of DLLs and EXEs in C:\build\mozilla-source\dist\WIN954.0_DBG.OBJ\bin now. _______________________________________________ dev-builds mailing list dev-builds@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-builds