+# apt sources
+if [ "$MIRROR" != "${MIRROR%file://}" ]; then
+ MIRROR=http://archive.ubuntu.com/ubuntu
+fi
+
+cat <<EOF > $DIR/etc/apt/sources.list
+deb $MIRROR $DIST main restricted universe multiverse
+deb-src $MIRROR $DIST main restricted universe multiverse
+deb $MIRROR $DIST-updates main restricted universe multiverse
+deb-src $MIRROR $DIST-updates main restricted universe multiverse
+deb $MIRROR $DIST-proposed main restricted universe multiverse
+deb-src $MIRROR $DIST-proposed main restricted universe multiverse
+deb $MIRROR $DIST-security main restricted universe multiverse
+deb-src $MIRROR $DIST-security main restricted universe multiverse
+EOF
+
+chroot $DIR apt-get update
+
+# common packages for development
+chroot $DIR apt-get install -y build-essential fakeroot
+