Installing Gazebo package in simulator_gazebo ROS stack on OSX Lion

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I am having a hard time getting the gazebo package in the simulator_gazebo stack to compile on Lion.

I can get all the ROS package dependencies installed, but when compiling Gazebo itself, I get a compilation error that looks like this:

-- BUILD WARNINGS -- CEGUI not found, opengl GUI will be disabled. -- Player not found, gazebo plugin for player will not be built. -- END BUILD WARNINGS

-- BUILD ERRORS: These must be resolved before compiling. -- Missing: tinyxml -- Missing: TBB - Threading Building Blocks -- END BUILD ERRORS

CMake Error at CMakeLists.txt:193 (message): Errors encountered in build.

-- Configuring incomplete, errors occurred! make[1]: * [installed] Error 1 CMake Error at CMakeLists.txt:29 (message): Build of Gazebo failed

-- Configuring incomplete, errors occurred!

I have installed both of the packages tinyxml and tbb from Homebrew, but the install script seems to be unable to find them.

Any help is appreciated.