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diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7821b27..723a1a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,11 @@ include(GNUInstallDirs)
include(CMakeDependentOption)
include(CMakePackageConfigHelpers)
-if(EXISTS ${CMAKE_BINARY_DIR}/conanbuildinfo_multi.cmake)
+option(USE_EXTERNAL_MDSPAN "Use external copy of mdspan" OFF)
+
+if(${USE_EXTERNAL_MDSPAN})
+ find_package(mdspan CONFIG REQUIRED)
+elseif(EXISTS ${CMAKE_BINARY_DIR}/conanbuildinfo_multi.cmake)
include(${CMAKE_BINARY_DIR}/conanbuildinfo_multi.cmake)
conan_basic_setup()
find_package(mdspan CONFIG REQUIRED)
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