Index: deal.ii/contrib/utilities/check_encoding.py
===================================================================
--- deal.ii.orig/contrib/utilities/check_encoding.py
+++ deal.ii/contrib/utilities/check_encoding.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 ## ------------------------------------------------------------------------
 ##
 ## SPDX-License-Identifier: LGPL-2.1-or-later
Index: deal.ii/contrib/utilities/checkdoxygen.py
===================================================================
--- deal.ii.orig/contrib/utilities/checkdoxygen.py
+++ deal.ii/contrib/utilities/checkdoxygen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 # run this script on all headers of deal.II to check various doxygen related problems
 
Index: deal.ii/contrib/utilities/indent.py
===================================================================
--- deal.ii.orig/contrib/utilities/indent.py
+++ deal.ii/contrib/utilities/indent.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 ## ------------------------------------------------------------------------
 ##
Index: deal.ii/contrib/utilities/parse_ctest_output.py
===================================================================
--- deal.ii.orig/contrib/utilities/parse_ctest_output.py
+++ deal.ii/contrib/utilities/parse_ctest_output.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 ## ------------------------------------------------------------------------
 ##
Index: deal.ii/contrib/utilities/relocate_libraries.py
===================================================================
--- deal.ii.orig/contrib/utilities/relocate_libraries.py
+++ deal.ii/contrib/utilities/relocate_libraries.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 ## ------------------------------------------------------------------------
 ##
Index: deal.ii/contrib/utilities/wrapcomments.py
===================================================================
--- deal.ii.orig/contrib/utilities/wrapcomments.py
+++ deal.ii/contrib/utilities/wrapcomments.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 
 ## ------------------------------------------------------------------------
 ##