diff --git a/contrib/scripts/install_prereq b/contrib/scripts/install_prereq
index e3b217c082d72bacd3a46da776361e3cf1c548bb..f8faf1e3176cc49283fae9522da964943e7ed5d0 100755
--- a/contrib/scripts/install_prereq
+++ b/contrib/scripts/install_prereq
@@ -24,10 +24,10 @@ PACKAGES_DEBIAN="build-essential"
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libedit-dev libjansson-dev libsqlite3-dev uuid-dev libxml2-dev"
 # Asterisk: for addons:
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libspeex-dev libspeexdsp-dev libogg-dev libvorbis-dev libasound2-dev portaudio19-dev libcurl4-openssl-dev xmlstarlet bison flex"
-PACKAGES_DEBIAN="$PACKAGES_DEBIAN libpq-dev unixodbc-dev libneon27-dev libgmime-2.6-dev libusb-dev liblua5.2-dev lua5.2 liburiparser-dev libxslt1-dev libssl-dev"
-PACKAGES_DEBIAN="$PACKAGES_DEBIAN libh323plus-dev libvpb-dev libmysqlclient-dev libbluetooth-dev libradcli-dev freetds-dev libosptk-dev libjack-jackd2-dev"
+PACKAGES_DEBIAN="$PACKAGES_DEBIAN libpq-dev unixodbc-dev libltdl-dev libneon27-dev libgmime-2.6-dev liblua5.2-dev liburiparser-dev libxslt1-dev libssl-dev"
+PACKAGES_DEBIAN="$PACKAGES_DEBIAN libh323plus-dev libvpb-dev libmysqlclient-dev libbluetooth-dev libradcli-dev freetds-dev libosptk-dev libjack-jackd2-dev bash"
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libsnmp-dev libiksemel-dev libcorosync-common-dev libcpg-dev libcfg-dev libnewt-dev libpopt-dev libical-dev libspandsp-dev"
-PACKAGES_DEBIAN="$PACKAGES_DEBIAN libresample1-dev libc-client2007e-dev binutils-dev libsrtp0-dev libsrtp2-dev libgsm1-dev doxygen zlib1g-dev libldap2-dev"
+PACKAGES_DEBIAN="$PACKAGES_DEBIAN libresample1-dev libc-client2007e-dev binutils-dev libsrtp0-dev libsrtp2-dev libgsm1-dev doxygen graphviz zlib1g-dev libldap2-dev"
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libcodec2-dev libfftw3-dev libsndfile1-dev libunbound-dev"
 # Asterisk: for the unpackaged below:
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN wget subversion"