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find_package(NoPrefix NO_CMAKE_INSTALL_PREFIX)
if(NoPrefix_FOUND)
message(FATAL_ERROR "Should not find package when NO_CMAKE_INSTALL_PREFIX specified")
endif()
set(CMAKE_FIND_USE_INSTALL_PREFIX ON)
find_package(NoPrefix)
if(NOT NoPrefix_FOUND)
message(FATAL_ERROR "Should always find package when CMAKE_FIND_USE_INSTALL_PREFIX is enabled")
endif()
unset(CMAKE_FIND_USE_INSTALL_PREFIX)
unset(NoPrefix_DIR CACHE)
find_package(NoPrefix REQUIRED)
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