diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f66ecb..10018c0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,7 @@ endif ()
 if (NOT DEFINED ortools_REF)
     message(FATAL_ERROR "ortools_REF is not defined")
 endif ()
+find_package (Python REQUIRED)
 FetchContent_Declare(ortools
         GIT_REPOSITORY ${ortools_REPO}
         GIT_TAG ${ortools_REF}
@@ -20,7 +21,7 @@ FetchContent_Declare(ortools
             ${CMAKE_CURRENT_SOURCE_DIR}/patch_utils.py
             ${CMAKE_CURRENT_SOURCE_DIR}/ortools
             ${CMAKE_CURRENT_SOURCE_DIR}/patchs
-            . && python patch.py
+            . && ${PYTHON_EXECUTABLE} patch.py
         OVERRIDE_FIND_PACKAGE ON
 )
 message("BUILD_DEPS: " ${BUILD_DEPS})
diff --git a/patch.py b/patch.py
index b37f7c5..7af5907 100644
--- a/patch.py
+++ b/patch.py
@@ -38,7 +38,7 @@
 
 # add the USE_SIRIUS configuration flag in deps.cmake
 full_patch.append(Addition(
-    Path.cwd()/'cmake'/'deps.cmake',
+    Path.cwd()/'cmake'/'system_deps.cmake',
     '''
 if(USE_CPLEX)
   find_package(CPLEX REQUIRED)