diff -Nurp lightdm/lightdm.install lightdm/lightdm.install
--- lightdm/lightdm.install	1970-01-01 01:00:00.000000000 +0100
+++ lightdm/lightdm.install	2012-02-13 20:47:19.648949353 +0100
@@ -0,0 +1,18 @@
+pkgname=lightdm
+
+post_install() {
+    getent group lightdm > /dev/null 2>&1 || groupadd -g 620 lightdm
+    getent passwd lightdm > /dev/null 2>&1 || useradd -c 'LightDM Display Manager' -u 620 -g lightdm -d /var/run/lightdm -s /sbin/nologin lightdm
+    passwd -l lightdm > /dev/null
+    chown -R lightdm:lightdm /var/run/lightdm > /dev/null
+    chmod +r /etc/lightdm/lightdm.conf
+}
+
+post_upgrade() {
+    post_install
+}
+
+post_remove() {
+    getent passwd lightdm > /dev/null 2>&1 && userdel lightdm
+    getent group lightdm > /dev/null 2>&1 && groupdel lightdm
+}
diff -Nurp lightdm/lightdm.tmpfiles lightdm/lightdm.tmpfiles
--- lightdm/lightdm.tmpfiles	1970-01-01 01:00:00.000000000 +0100
+++ lightdm/lightdm.tmpfiles	2012-02-13 20:31:58.624187559 +0100
@@ -0,0 +1 @@
+d /var/run/lightdm 0770 lightdm lightdm -
diff -Nurp lightdm/PKGBUILD lightdm/PKGBUILD
--- lightdm/PKGBUILD	2012-02-13 20:01:50.592011482 +0100
+++ lightdm/PKGBUILD	2012-02-13 20:53:46.474381020 +0100
@@ -8,12 +8,14 @@ license=('GPL3' 'LGPL3')
 source=("http://launchpad.net/lightdm/trunk/$pkgver/+download/$pkgname-$pkgver.tar.gz"
 	lightdm
 	lightdm.service
+	lightdm.tmpfiles
 	lightdm-gtk-greeter.conf
 	lightdm.pam
 	lightdm-x11.patch
 	Xsession)
 depends=('gnome-themes-standard' 'gnome-icon-theme' 'libwebkit' 'dbus-glib' 'gtk3' 'libxklavier' 'accountsservice')
 options=(!libtool)
+install=lightdm.install
 
 optdepends=('xorg-server-xephyr: run lightdm in test mode' 
 	    'lightdm-webkit-greeter-bzr: webkit lightdm greeter'
@@ -38,7 +40,7 @@ build() {
    ./autogen.sh 
    ./configure --prefix=/usr \
      --sysconfdir=/etc --disable-static --libexecdir=/usr/lib/lightdm \
-     --localstatedir=/var --with-greeter-user=root \
+     --localstatedir=/var --with-greeter-user=lightdm \
      --with-greeter-session=lightdm-gtk-greeter     
    sed -i 's/lightdm-session//' tests/src/Makefile
    make || return 1
@@ -50,10 +52,12 @@ package() {
   mkdir -p $pkgdir/etc/rc.d 
   mkdir -p $pkgdir/lib/systemd/system/
   mkdir -p $pkgdir/etc/pam.d 
+  mkdir -p $pkgdir/var/run/lightdm
 
 # init services file 
   install -m755 ../lightdm $pkgdir/etc/rc.d
   install -m644 ../lightdm.service $pkgdir/lib/systemd/system/
+  install -D -m644 ../lightdm.tmpfiles $pkgdir/usr/lib/tmpfiles.d/lightdm.conf
 
 # pam file for gnome-keyring
   install -m644 ../lightdm.pam $pkgdir/etc/pam.d/lightdm
@@ -71,6 +75,7 @@ package() {
 md5sums=('d3de7006f03f6ab3cdb7dc15508eed28'
          '6699eb35f65ff498d1d05e6782f4f902'
          '52003b799271a4d19be51f05b8184eff'
+         '72b35c23098c8ddd76d82da7b847e10b'
          'c4321c8f3fd64a3d508b1868328121de'
          '917df3fa0c57ff7a8af4e66c28b1b7db'
          'bb9db2c2c10aa95bd2dbfc6e8e67f00a'