--- app-emulation/virtualbox/virtualbox-4.0.12.ebuild	2011-07-22 12:31:03.000000000 +0200
+++ app-emulation/virtualbox/virtualbox-4.0.12.ebuild	2011-07-24 01:22:22.915742515 +0200
@@ -22,7 +22,7 @@ HOMEPAGE="http://www.virtualbox.org/"
 LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="~amd64 x86"
-IUSE="+additions alsa doc extensions headless java pulseaudio +opengl python +qt4 +sdk vboxwebsrv vnc"
+IUSE="+additions alsa doc extensions headless java pulseaudio +opengl python +qt4 +sdk vboxwebsrv vnc +pam"
 
 RDEPEND="!app-emulation/virtualbox-bin
 	~app-emulation/virtualbox-modules-${PV}
@@ -56,7 +56,7 @@ DEPEND="${RDEPEND}
 	sys-devel/dev86
 	sys-power/iasl
 	media-libs/libpng
-	sys-libs/pam
+	pam? ( sys-libs/pam )
 	sys-libs/libcap
 	doc? (
 		dev-texlive/texlive-basic
@@ -145,6 +145,9 @@ src_prepare() {
 	sed -e "s/MY_LIBDIR/$(get_libdir)/" \
 		"${FILESDIR}"/${PN}-4-localconfig > LocalConfig.kmk || die
 
+	# Use PAM only when wanted
+	use pam || sed -i 's/^.*VBOX_WITH_PAM/#VBOX_WITH_PAM/' Config.kmk || die
+
 	# unset useless/problematic checks in configure
 	epatch "${FILESDIR}/${PN}-ose-3.2.8-mesa-check.patch" \
 		"${FILESDIR}/${PN}-4-makeself-check.patch" \