The buildbot uses a separate `CMAKE_INSTALL_PREFIX`. This means that
the unit test could not find its USD JSON files in the build directory.
Using `${CMAKE_INSTALL_PREFIX}` instead of `$<TARGET_FILE_DIR:blender>`
solved this.
The buildbot uses a separate `CMAKE_INSTALL_PREFIX`. This means that
the unit test could not find its USD JSON files in the build directory.
Using `${CMAKE_INSTALL_PREFIX}` instead of `$<TARGET_FILE_DIR:blender>`
solved this.