==> Installing dbus
==> Using the sandbox
==> Cloning https://anongit.freedesktop.org/git/dbus/dbus.git
Updating /Users/zbentley/Library/Caches/Homebrew/dbus--git
==> Checking out branch master
==> Downloading https://raw.githubusercontent.com/Homebrew/formula-patches/0a8a55872e/d-bus/org.freedesktop.dbus-session.plist.osx.diff
Already downloaded: /Users/zbentley/Library/Caches/Homebrew/dbus--patch-a8aa6fe3f2d8f873ad3f683013491f5362d551bf5d4c3b469f1efbc5459a20dc.diff
==> Patching
==> Applying org.freedesktop.dbus-session.plist.osx.diff
patching file bus/org.freedesktop.dbus-session.plist.in
==> ./autogen.sh --no-configure
Last 15 lines from /Users/zbentley/Library/Logs/Homebrew/dbus/01.autogen.sh:
configure.ac:16: installing 'build-aux/config.guess'
configure.ac:16: installing 'build-aux/config.sub'
configure.ac:21: installing 'build-aux/install-sh'
configure.ac:21: installing 'build-aux/missing'
configure.ac:111: installing 'build-aux/tap-driver.sh'
bus/Makefile.am: installing 'build-aux/depcomp'
configure.ac:95: error: Unexpanded AX_ macro found. Please install GNU autoconf-archive
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure.ac:375: error: Unexpanded AX_ macro found. Please install GNU autoconf-archive
configure.ac:1371: error: Unexpanded AX_ macro found. Please install GNU autoconf-archive
configure.ac:1376: error: Unexpanded AX_ macro found. Please install GNU autoconf-archive
configure.ac:1385: error: Unexpanded AX_ macro found. Please install GNU autoconf-archive
configure.ac:1391: error: Unexpanded AX_ macro found. Please install GNU autoconf-archive
autoconf failed - version 2.5x is probably required

READ THIS: https://git.io/brew-troubleshooting

These open issues may also help:
dbus: add manpages and missing build dependencies https://github.com/Homebrew/homebrew-core/pull/6835