diff -Nur biboumi-9.0/CMakeLists.txt new/CMakeLists.txt
--- biboumi-9.0/CMakeLists.txt	2020-09-22 22:50:04.000000000 +0200
+++ new/CMakeLists.txt	2021-04-18 19:29:24.221380325 +0200
@@ -290,22 +290,26 @@
 #
 ## Add a rule to download the catch unit test framework
 #
-include(ExternalProject)
-ExternalProject_Add(catch
-  GIT_REPOSITORY "https://lab.louiz.org/louiz/Catch.git"
-  PREFIX "external"
-  UPDATE_COMMAND ""
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND ""
-  INSTALL_COMMAND ""
+pkg_check_modules(Catch2 catch2)
+if (Catch2_FOUND)
+	include_directories("${Catch2_INCLUDEDIR}/catch2")
+elseif (NOT Catch2_FOUND AND NOT EXISTS ${CMAKE_SOURCE_DIR}/tests/catch.hpp)
+  include(ExternalProject)
+  ExternalProject_Add(catch
+    GIT_REPOSITORY "https://lab.louiz.org/louiz/Catch.git"
+    PREFIX "external"
+    UPDATE_COMMAND ""
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ""
   )
-set_target_properties(catch PROPERTIES EXCLUDE_FROM_ALL TRUE)
-ExternalProject_Get_Property(catch SOURCE_DIR)
-if(NOT EXISTS ${CMAKE_SOURCE_DIR}/tests/catch.hpp)
+  set_target_properties(catch PROPERTIES EXCLUDE_FROM_ALL TRUE)
+  ExternalProject_Get_Property(catch SOURCE_DIR)
   target_include_directories(test_suite
     PUBLIC "${SOURCE_DIR}/single_include/"
     )
   add_dependencies(test_suite catch)
+  add_dependencies(dist catch)
 endif()
 
 #
@@ -372,7 +376,7 @@
   )
 add_custom_target(dist
   DEPENDS ${ARCHIVE_NAME}.tar.xz
-  DEPENDS catch)
+  )
 
 add_custom_target(rpm
   DEPENDS dist