--- a/src/tc/CMakeLists.txt
+++ b/src/tc/CMakeLists.txt
@@ -1,6 +1,9 @@
 cmake_minimum_required (VERSION 3.22)
 
-add_subdirectory(${CMAKE_SOURCE_DIR}/src/tc/corrosion)
+find_package(Corrosion QUIET)
+if (NOT Corrosion_FOUND)
+  add_subdirectory(${CMAKE_SOURCE_DIR}/src/tc/corrosion)
+endif()
 
 # Import taskchampion-lib as a CMake library.
 corrosion_import_crate(