From d58699c9ab9d20010b15aa38382ad517a8280179 Mon Sep 17 00:00:00 2001
From: Henry Schreiner <HenrySchreinerIII@gmail.com>
Date: Fri, 24 Sep 2021 17:47:03 -0400
Subject: [PATCH] fix(cmake): reduce chance for variable collision (#3302)

---
 tools/pybind11NewTools.cmake | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/pybind11NewTools.cmake b/tools/pybind11NewTools.cmake
index b93f9145e..0a7b84706 100644
--- a/tools/pybind11NewTools.cmake
+++ b/tools/pybind11NewTools.cmake
@@ -82,11 +82,11 @@ if(NOT DEFINED ${_Python}_EXECUTABLE)
 
 endif()
 
-if(NOT ${_Python}_EXECUTABLE STREQUAL PYTHON_EXECUTABLE_LAST)
+if(NOT ${_Python}_EXECUTABLE STREQUAL PYBIND11_PYTHON_EXECUTABLE_LAST)
   # Detect changes to the Python version/binary in subsequent CMake runs, and refresh config if needed
   unset(PYTHON_IS_DEBUG CACHE)
   unset(PYTHON_MODULE_EXTENSION CACHE)
-  set(PYTHON_EXECUTABLE_LAST
+  set(PYBIND11_PYTHON_EXECUTABLE_LAST
       "${${_Python}_EXECUTABLE}"
       CACHE INTERNAL "Python executable during the last CMake run")
 endif()