Add the installation prefix to CMAKE_PREFIX_PATH

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Hi, I am trying to make a subscriber program that listens to an installed package called roscopter. I know the topic and package name. In the CMakeLists i have included the package "roscopter"

find_package(catkin REQUIRED COMPONENTS roscpp roscopter)

However, when i run catkin_make it could not find the package. If tried manually changing the CMAKE_PREFIX_PATH however the error continues.

Here is the cpp that i have:

#include <ros/ros.h>
#include <roscopter/Attitude.h>
#include <iomanip> // for std::setprecision and std::fixed

// A callback function.  Executed each time a new pose
// message arrives.
void attMessageReceived(const roscopter::Attitude& msg) {
  ROS_INFO_STREAM(std::setprecision(2) << std::fixed
    << "roll" <<  msg.roll;
}

int main(int argc, char **argv) {
  // Initialize the ROS system and become a node.
  ros::init(argc, argv, "subscribe_to_atttiude");
  ros::NodeHandle nh;

  // Create a subscriber object.
  ros::Subscriber sub = nh.subscribe("Attitude", 1000,
    &attMessageReceived);

  // Let ROS take over.
  ros::spin();
}

And the CMakeLists.txt is as follows:

# What version of CMake is needed?
cmake_minimum_required(VERSION 2.8.3)

# The name of this package.
project(agitr)

# Find the catkin build system, and any other packages on which we depend.
find_package(catkin REQUIRED COMPONENTS roscpp roscopter)

# Declare our catkin package.
catkin_package()

# Specify locations of header files.
include_directories(include ${catkin_INCLUDE_DIRS})
include_directories(include ${~/home/CATWorkspaces})

# Declare the executable, along with its source files.
add_executable(subatt subatt.cpp)


# Specify libraries against which to link.
target_link_libraries(subatt ${catkin_LIBRARIES})

Any help is highly appreciated. Thanks!