@TikhonJelvis, thanks for your PR! By analyzing the history of the files in this pull request, we identified @jwiegley, @pikajude and @ttuegel to be potential reviewers.

Please correct the PR-Title, it's not emacs-25.5, it's emacs-24.5. Thx!

@periklis Thanks! Updated the title.

I also looked at the Travis errors and didn't understand where they came from.

One of the builds failed on Linux by timing out—presumably this isn't a problem because this package is meant for MacOS only?

The build on OSX with XCode 7.3 failed because Emacs was missing X:

checking for libXaw... configure: error: No X toolkit could be found.
If you are sure you want Emacs compiled without an X toolkit, pass
  --with-x-toolkit=no
to configure.  Otherwise, install the development libraries for the toolkit
that you want to use (e.g. Gtk+) and re-run configure.
builder for ‘/nix/store/rkjxs75glqq3f3r3cbjqv95fmhys2lac-emacs-24.5-mac-5.15.drv’ failed with exit code 1

This looks like a something to do with how the build machine was configured—I don't understand why the build failed like this.

@TikhonJelvis Emacs mac port should use cocoa instead of x. See issue #20682.

Okay, if I'm understanding correctly, I'm running into the same bug as #20682? Is there anything I should do, or should I just wait for that problem to be resolved? I don't think I'm familiar enough with the package to try fixing that problem myself.