The installer source files here are for creating the App Inventor setup installer packages for Linux, MacOS, and Windows. The Linux version creates a Debian Package The Mac version must be built on the Mac. It uses Iceberg to build the installer. The Windows version uses NSIS and must be built on Windows. The code for the three systems are all independent. See the README file in each subdirectory. Each subdirectory also contains the last-built version of the installer. All the build programs will need to be changed to reflect upgrades to Android since December 2010. When you deploy a new set of packages, these must all have the same version number (current version is 1.1). This must match the value of CURRENT_AI_SETUP_VERSION in appinventor/blockslib/src/openblocks/codeblockutil/AIDirectory.java