Hello everyone,

When attempting to build a ROS package 
<https://wiki.ros.org/velodyne_gazebo_plugins> (Noetic) on Conda, I run 
into the following error:
```
Call Stack (most recent call first):
  /usr/lib/x86_64-linux-gnu/cmake/gazebo/gazebo-config.cmake:206 
(find_package)
  CMakeLists.txt:11 (find_package)


CMake Error at 
/opt/anaconda3/envs/ros_exp/lib/cmake/protobuf/protobuf-targets.cmake:42 
(message):
  Some (but not all) targets in this export set were already defined.

  Targets Defined: protobuf::libprotobuf-lite, protobuf::libprotobuf,
  protobuf::libprotoc, protobuf::protoc

  Targets not yet defined: protobuf::libupb, protobuf::protoc-gen-upb,
  protobuf::protoc-gen-upbdefs, protobuf::protoc-gen-upb_minitable

Call Stack (most recent call first):
  /opt/anaconda3/envs/ros_exp/lib/cmake/protobuf/protobuf-config.cmake:16 
(include)
  /usr/share/cmake/ignition-cmake2/cmake2/FindIgnProtobuf.cmake:29 
(find_package)
  
/usr/lib/x86_64-linux-gnu/cmake/ignition-transport8/ignition-transport8-config.cmake:92
 
(find_package)
  /usr/lib/x86_64-linux-gnu/cmake/gazebo/gazebo-config.cmake:244 
(find_package)
  CMakeLists.txt:11 (find_package)
```
I have tried with the following dependencies:
```
conda list                                                                 
                                                                            
                                                                            
                       ──(Fri,Aug22)─┘
# packages in environment at /opt/anaconda3/envs/ros_exp:
#
# Name                     Version          Build                  Channel
libprotobuf                5.27.1           hb1b590f_0             
conda-forge
protobuf                   5.27.1           py313h46c70d0_0       
 conda-forge
```
I have attached a full list of packages installed in the virtual 
environment, if anybody wishes to check something ('Conda_list.txt').
Any hints as to what I may be doing incorrectly would be greatly 
appreciated.

I plan to compile Protobuf from source 
<https://github.com/protocolbuffers/protobuf/tree/main/src> to try to get 
it to work.

OS: Ubuntu 20.04
Package Manager: Conda

Regards,
Arnab

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