Before you install nessus-plugins, the packages 'nessus-libraries', 'libnasl' and 'nessus-core' should be installed on your system. Make sure that the program 'nessus-config' is in your path, or else you won't be able to compile the plugins. 'nessus-config' is installed in /usr/local/bin. The compilation of nessus-plugins is straightforward : ./configure make and then as root : make install