muffin-wm errors

==> Building and installing package
==> Making package: muffin-wm 1.0.3-2 (Mon May 21 10:16:49 EDT 2012)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
  -> Found muffin-wm.tar.gz
  -> Found 0001-frame-initialize-style-contexts.patch
==> Validating source files with md5sums...
    muffin-wm.tar.gz ... Passed
    0001-frame-initialize-style-contexts.patch ... Passed
==> Extracting Sources...
  -> Extracting muffin-wm.tar.gz with bsdtar
==> Removing existing pkg/ directory...
==> Starting build()...
patching file src/ui/frames.c
autoreconf: Entering directory `.'
autoreconf: configure.in: not using Gettext
autoreconf: running: aclocal --force
configure.in:46: warning: macro 'AM_PROG_LIBTOOL' not found in library
autoreconf: configure.in: tracing
autoreconf: configure.in: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
configure.in:45: error: possibly undefined macro: AC_LIBTOOL_WIN32_DLL
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure.in:46: error: possibly undefined macro: AM_PROG_LIBTOOL
autoreconf: /usr/bin/autoconf failed with exit status: 1
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Makepkg was unable to build muffin-wm.