diff --git a/cmake.cmake b/cmake.cmake
index 2cdf085..59ce579 100644
--- a/cmake.cmake
+++ b/cmake.cmake
@@ -1,5 +1,7 @@
 set(DIR_OF_GITVERSION_TOOL "${CMAKE_CURRENT_LIST_DIR}" CACHE INTERNAL "DIR_OF_GITVERSION_TOOL")
 
+find_program(PYTHON3 NAMES python3 python REQUIRED)
+
 function (_CREATE_GIT_VERSION_FILE)
   FILE(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/messmer_gitversion")
   FILE(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/messmer_gitversion/gitversion")
@@ -9,7 +11,7 @@ function (_CREATE_GIT_VERSION_FILE)
   ELSE()
       SET(ENV{PYTHONPATH} "${DIR_OF_GITVERSION_TOOL}/src")
   ENDIF()
-  EXECUTE_PROCESS(COMMAND /usr/bin/env python -m gitversionbuilder --lang cpp --dir "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/messmer_gitversion/gitversion/version.h"
+  EXECUTE_PROCESS(COMMAND /usr/bin/env ${PYTHON3} -m gitversionbuilder --lang cpp --dir "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/messmer_gitversion/gitversion/version.h"
 		  RESULT_VARIABLE result)
   IF(NOT ${result} EQUAL 0)
     MESSAGE(FATAL_ERROR "Error running messmer/git-version tool. Return code is: ${result}")