--- CMakeLists.txt.orig	2020-05-28 18:23:09 UTC
+++ CMakeLists.txt
@@ -20,9 +20,11 @@ add_library(ls-qpack "")
 target_include_directories(ls-qpack PUBLIC .)
 target_sources(ls-qpack PRIVATE lsqpack.c)
 
-target_include_directories(ls-qpack PRIVATE deps/xxhash/)
 if(LSQPACK_XXH)
-    target_sources(ls-qpack PRIVATE deps/xxhash/xxhash.c)
+    find_path(XXHASH_INCLUDE_DIR xxhash.h)
+    find_library(XXHASH_LIBRARY xxhash)
+    include_directories(${XXHASH_INCLUDE_DIR})
+    link_libraries(${XXHASH_LIBRARY})
 endif()
 
 if(MSVC)