# CPACK_PACKAGING_INSTALL_PREFIX

The prefix used in the built package.

Each CPack generator has a default value (like `/usr`). This default value may be overwritten from the `CMakeLists.txt` or the `cpack(1)` command line by setting an alternative value. Example:

    set(CPACK_PACKAGING_INSTALL_PREFIX "/opt")

This is not the same purpose as `CMAKE_INSTALL_PREFIX` which is used when installing from the build tree without building a package.