heres a nosystemd PKGBUILD that i use for my wacom pen-tablet .... may be useful to someone...
# $Id$
# Maintainer: Andreas Radke <andyrtr@ archlinux.org>
# Maintainer: Jan Alexander Steffens (heftig) <jan.steffens@ gmail.com>
# Contributor: Jan de Groot <jgc@ archlinux.org>
# Contributor: M Rawash <mrawash@ gmail.com>
# Hacked to remove systemd dependency and unit-dir by me :)
pkgname=xf86-input-wacom-nosystemd
_pkgname=xf86-input-wacom
pkgver=0.32.0
pkgrel=1
pkgdesc="X.Org Wacom tablet driver"
arch=(i686 x86_64)
url="http://linuxwacom.sourceforge.net/"
license=(GPL)
depends=(libxi libxinerama libxrandr)
makedepends=('xorg-server-devel-nosystemd' 'X-ABI-XINPUT_VERSION=22.1' 'resourceproto' 'scrnsaverproto')
conflicts=('xorg-server<1.16' 'X-ABI-XINPUT_VERSION<22.1' 'X-ABI-XINPUT_VERSION>=23')
source=(http://downloads.sourceforge.net/project/linuxwacom/$_pkgname/$_pkgname-$pkgver.tar.bz2)
sha1sums=('527dc9da04734348e905bead5fbda61aa5c17b5a')

build() {
  cd $_pkgname-$pkgver
  ./configure --prefix=/usr --with-systemd-unit-dir=no 
  make
}

package() {
  cd $_pkgname-$pkgver
  make DESTDIR="$pkgdir" install
}
14 days later
new version (fixes a libinput related bug :( ) also added xf86-input-wacom as a conflict.. 
# $Id$
# Maintainer: Andreas Radke <andyrtr@ archlinux.org>
# Maintainer: Jan Alexander Steffens (heftig) <jan.steffens@ gmail.com>
# Contributor: Jan de Groot <jgc@ archlinux.org>
# Contributor: M Rawash <mrawash@ gmail.com>
# Contributor: (nosystemd) ncmprhnsbl <ncmprhnsb1@ openmailbox.org>

pkgname=xf86-input-wacom-nosystemd
_pkgname=xf86-input-wacom
pkgver=0.33.0
pkgrel=1
pkgdesc="X.Org Wacom tablet driver"
arch=(i686 x86_64)
url="http://linuxwacom.sourceforge.net/"
license=(GPL)
replaces=(xf86-input-wacom)
provides=(xf86-input-wacom)
depends=(libxi libxinerama libxrandr)
makedepends=('xorg-server-devel-nosystemd' 'X-ABI-XINPUT_VERSION=22.1' 'resourceproto' 'scrnsaverproto')
conflicts=('xorg-server<1.18' 'X-ABI-XINPUT_VERSION<22.1' 'X-ABI-XINPUT_VERSION>=23' 'xf86-input-wacom')
source=(http://downloads.sourceforge.net/project/linuxwacom/$_pkgname/$_pkgname-$pkgver.tar.bz2)
sha1sums=('3744a2f77010c2726be28e056039810067912543')

build() {
  cd $_pkgname-$pkgver
  ./configure --prefix=/usr --with-systemd-unit-dir=no 
  make
}

package() {
  cd $_pkgname-$pkgver
  make DESTDIR="$pkgdir" install
}
if i can make a remark :
add this :
replaces=(xf86-input-wacom)
provides=(xf86-input-wacom)

if you don't implement those lines, when you try to install an xxx packages which depends on xf86-input-wacom, the installation failed because pacman do not find it.

BTW thanks you so much for your contributions. Maybe a day, we have an "OUR repository" :)

note : "# Hacked to remove systemd dependency and unit-dir by me :)". Do not hesitate to put a valid email here :)
thanks eric, edited the above post with your suggestions. i'm not sure sure i'm at "packager level" tho ;)
a year later
please note that xf86-input-wacom is now included in the obarun repository.
thanks eric :)

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