post_install() {
    printf '%s\n' 'In order to use the the Intel Media Driver for VAAPI you need to set the'
    printf '%s\n' "'LIBVA_DRIVER_NAME' environment variable to 'iHD'. You can do this, for"
    printf '%s\n' "example, by uncommenting the proper lines in '/etc/profile.d/intel-mediasdk.sh'"
    printf '%s\n' '(relogin after).'
}

post_upgrade() {
    post_install
}