--- boomerang-0.5.2/CMakeLists.txt
+++ boomerang-0.5.2/CMakeLists.txt
@@ -16,9 +16,7 @@ if (DEFINED ENV{VCPKG_ROOT} AND NOT DEFI
     set(CMAKE_TOOLCHAIN_FILE "$ENV{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake" CACHE STRING "")
 endif (DEFINED ENV{VCPKG_ROOT} AND NOT DEFINED CMAKE_TOOLCHAIN_FILE)
 
-if (CMAKE_TOOLCHAIN_FILE)
-    include("${CMAKE_TOOLCHAIN_FILE}")
-endif (CMAKE_TOOLCHAIN_FILE)
+# the toolchain file is already processed by project()
 
 
 set(CMAKE_WARN_DEPRECATED ON)