Arch Linux

I had installed:
[code]local/virtualbox 5.0.14-1
local/virtualbox-ext-oracle 5.0.14-1
local/virtualbox-guest-iso 5.0.14-1
local/virtualbox-host-modules 5.0.14-4
local/linux 4.4.3-1
[/code]

Today I want to upgrade but:
[code]:: Synchronizing package databases...
...
:: Starting full system upgrade...
:: Replace virtualbox-host-modules with community/virtualbox-host-dkms? [Y/n] n
resolving dependencies...
looking for conflicting packages...

Packages (55) apr-util-1.5.4-2 avahi-0.6.32-2 binutils-2.26-3 curl-7.47.1-2 dkms-2.2.0.3+git151023-5
gfbgraph-0.2.3-1 git-2.7.2-2 gnutls-3.4.10-1 gst-plugins-bad-1.6.3-6 krb5-1.13.2-3
ldns-1.6.17-4 libdatrie-0.2.10-1 libevent-2.0.22-2 libimobiledevice-1.2.0-3 libldap-2.4.43-3
libshout-1:2.4.1-2 libssh2-1.7.0-2 libthai-0.1.24-1 neon-0.30.1-2 nmap-7.01-2 nodejs-5.7.1-2
openssl-1.0.2.g-3 opusfile-0.7-2 perl-net-ssleay-1.72-3 python-3.5.1-2 python-dbus-1.2.2-1
python-dbus-common-1.2.2-1 python2-2.7.11-2 python2-cryptography-1.2.3-2 python2-dbus-1.2.2-1
qt4-4.8.7-7 qt5-base-5.5.1-10 qt5-declarative-5.5.1-10 qt5-location-5.5.1-10
qt5-quick1-5.5.1-10 qt5-quickcontrols-5.5.1-10 qt5-script-5.5.1-10 qt5-sensors-5.5.1-10
qt5-svg-5.5.1-10 qt5-webchannel-5.5.1-10 qt5-webkit-5.5.1-10 qt5-x11extras-5.5.1-10
qt5-xmlpatterns-5.5.1-10 redland-1:1.0.17-3 rtmpdump-1:2.4.r96.fa8646d-2 s-nail-14.8.6-2
serf-1.3.8-2 sqlite-3.11.1-1 transmission-cli-2.90-3 transmission-gtk-2.90-3
virtualbox-5.0.14-4 virtualbox-host-dkms-5.0.14-4 wget-1.16.3-2 wpa_supplicant-1:2.5-3
xkeyboard-config-2.17-2
...
[/code]

Why it installs [b]dkms[/b]? The wiki doesn't say anything about this, either in the Arch news.