diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2450e1..3f52516 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -72,7 +72,6 @@ set(C4CORE_SRC_FILES
 if(C4CORE_WITH_FASTFLOAT)
     list(APPEND C4CORE_SRC_FILES
         c4/ext/fast_float.hpp
-        c4/ext/fast_float_all.h
         )
 endif()
 set(C4CORE_AMALGAMATED ${C4CORE_SRC_DIR}/../src_singleheader/c4/c4core_all.hpp)
@@ -92,7 +91,10 @@ c4_add_library(c4core
     SOURCES ${C4CORE_SRC_FILES}
 )
 
-if(NOT C4CORE_WITH_FASTFLOAT)
+if(C4CORE_WITH_FASTFLOAT)
+    find_package(FastFloat REQUIRED CONFIG)
+    target_link_libraries(c4core PUBLIC "FastFloat::fast_float")
+else()
     target_compile_definitions(c4core PUBLIC -DC4CORE_NO_FAST_FLOAT)
 endif()
 
diff --git a/src/c4/ext/fast_float.hpp b/src/c4/ext/fast_float.hpp
index 9e75b5e..64aa2a4 100644
--- a/src/c4/ext/fast_float.hpp
+++ b/src/c4/ext/fast_float.hpp
@@ -15,7 +15,7 @@
 #   pragma GCC diagnostic ignored "-Wuseless-cast"
 #endif
 
-#include "c4/ext/fast_float_all.h"
+#include "fast_float/fast_float.h"
 
 #ifdef _MSC_VER
 #   pragma warning(pop)