error in compile of plugin in stand alone gazebo

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Dear my friends,

I've downloaded the plugins from this address, but when i run cmake.. i get this error

        root@vahid:~/plugin# cd build/
root@vahid:~/plugin/build# cmake ..
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
CMake Error at CMakeLists.txt:42 (gz_install_includes):
  Unknown CMake command "gz_install_includes".


-- Configuring incomplete, errors occurred!

what is my wrong ?