--- calamares-3.1.11/CMakeLists.txt.orig	2018-01-01 02:00:41.654943238 +0100
+++ calamares-3.1.11/CMakeLists.txt	2018-01-01 01:59:38.849762152 +0100
@@ -133,7 +133,7 @@
     enable_testing()
 endif ()
 
-find_package( PythonLibs 3.3 )
+find_package( PythonLibs 3.3 EXACT REQUIRED )
 set_package_properties(
     PythonLibs PROPERTIES
     DESCRIPTION "C interface libraries for the Python 3 interpreter."