Hi team,

   I am trying to install VPP directly on ubuntu 20.04. While installing
for vpp plugins/vpp-lib I see dependencies error where
installation candidates could have obsoleted.

Can you please provide the workaround for below issue

gna@admin:/var/log$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal

gna@admin:/var/log$ sudo apt install vpp-lib
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 vpp-lib : Depends: *libboost-system1.65.1 *but it is not installable
E: Unable to correct problems, you have held broken packages.

*gna@admin:/var/log$ sudo apt install vpp-plugins*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 vpp-plugins : Depends: vpp (= 19.01.3-release) but 21.10.1-release is to
be installed
E: Unable to correct problems, you have held broken packages.


*gna@admin:/var/log$ apt-cache search libboost-system**
libboost-system-dev - Operating system (e.g. diagnostics support) library
(default version)
libboost-system1.71-dev - Operating system (e.g. diagnostics support)
library
libboost-system1.71.0 - Operating system (e.g. diagnostics support) library
libboost-system1.67-dev - Operating system (e.g. diagnostics support)
library
libboost-system1.67.0 - Operating system (e.g. diagnostics support) library
libboost-system1.62-dev - Operating system (e.g. diagnostics support)
library
libboost-system1.62.0 - Operating system (e.g. diagnostics support) library


*gna@admin:/var/log$ sudo apt install libboost-system1.65.1*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libboost-system1.65.1 is not available, but is referred to by
another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'libboost-system1.65.1' has no installation candidate

Suresh Kumar Vuppala
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