Install Err no package conf file message_generation

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Hello,

I am trying to install groovy on OSx 10.8.2, following this guide

hxxp://www.ros.org/wiki/groovy/Installation/OSX/Homebrew/Source

when i configure the build this happens

-- +++ processing catkin package: 'std_msgs' -- ==> add_subdirectory(std_msgs) CMake Error at build/devel/share/catkin/cmake/catkinConfig.cmake:71 (find_package): Could not find a package configuration file provided by "message_generation" with any of the following names:

message_generationConfig.cmake
message_generation-config.cmake

Add the installation prefix of "message_generation" to CMAKE_PREFIX_PATH or set "message_generation_DIR" to a directory containing one of the above files. If "message_generation" provides a separate development package or SDK, be sure it has been installed. Call Stack (most recent call first): std_msgs/CMakeLists.txt:4 (find_package)

-- Configuring incomplete, errors occurred!

Can someone please help?