diff -durN gobject-introspection-1.57.2.orig/giscanner/docwriter.py gobject-introspection-1.57.2/giscanner/docwriter.py
--- gobject-introspection-1.57.2.orig/giscanner/docwriter.py	2018-06-27 10:08:59.000000000 +0300
+++ gobject-introspection-1.57.2/giscanner/docwriter.py	2018-08-06 23:19:31.134974973 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- Mode: Python -*-
 # GObject-Introspection - a framework for introspecting GObject libraries
 # Copyright (C) 2010 Zach Goldberg
diff -durN gobject-introspection-1.57.2.orig/giscanner/message.py gobject-introspection-1.57.2/giscanner/message.py
--- gobject-introspection-1.57.2.orig/giscanner/message.py	2016-03-14 13:49:01.000000000 +0300
+++ gobject-introspection-1.57.2/giscanner/message.py	2018-08-06 23:19:31.134974973 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- Mode: Python -*-
 # GObject-Introspection - a framework for introspecting GObject libraries
 # Copyright (C) 2010 Red Hat, Inc.
diff -durN gobject-introspection-1.57.2.orig/giscanner/scannermain.py gobject-introspection-1.57.2/giscanner/scannermain.py
--- gobject-introspection-1.57.2.orig/giscanner/scannermain.py	2018-08-03 19:14:40.000000000 +0300
+++ gobject-introspection-1.57.2/giscanner/scannermain.py	2018-08-06 23:19:31.135975042 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- Mode: Python -*-
 # GObject-Introspection - a framework for introspecting GObject libraries
 # Copyright (C) 2008-2010 Johan Dahlin
diff -durN gobject-introspection-1.57.2.orig/giscanner/shlibs.py gobject-introspection-1.57.2/giscanner/shlibs.py
--- gobject-introspection-1.57.2.orig/giscanner/shlibs.py	2018-07-11 17:19:34.000000000 +0300
+++ gobject-introspection-1.57.2/giscanner/shlibs.py	2018-08-06 23:19:31.135975042 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- Mode: Python -*-
 # GObject-Introspection - a framework for introspecting GObject libraries
 # Copyright (C) 2009 Red Hat, Inc.
diff -durN gobject-introspection-1.57.2.orig/misc/update-glib-annotations.py gobject-introspection-1.57.2/misc/update-glib-annotations.py
--- gobject-introspection-1.57.2.orig/misc/update-glib-annotations.py	2016-10-03 13:19:40.000000000 +0300
+++ gobject-introspection-1.57.2/misc/update-glib-annotations.py	2018-08-06 23:19:31.136975111 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/python3
 # Scan glib sources.
 # e.g.:
 #   ./update-glib-annotations.py ../../glib ../../glib/_build
diff -durN gobject-introspection-1.57.2.orig/misc/update-gtkdoc-tests.py gobject-introspection-1.57.2/misc/update-gtkdoc-tests.py
--- gobject-introspection-1.57.2.orig/misc/update-gtkdoc-tests.py	2015-06-28 10:31:35.000000000 +0300
+++ gobject-introspection-1.57.2/misc/update-gtkdoc-tests.py	2018-08-06 23:19:31.136975111 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 # -*- Mode: Python -*-
 
diff -durN gobject-introspection-1.57.2.orig/misc/verbump.py gobject-introspection-1.57.2/misc/verbump.py
--- gobject-introspection-1.57.2.orig/misc/verbump.py	2016-03-14 13:49:01.000000000 +0300
+++ gobject-introspection-1.57.2/misc/verbump.py	2018-08-06 23:19:31.136975111 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # Automakes a release preparation for a post-release project
 # * Create a git tag
 # * Bump version in configure.ac and commit it
diff -durN gobject-introspection-1.57.2.orig/tests/gi-tester gobject-introspection-1.57.2/tests/gi-tester
--- gobject-introspection-1.57.2.orig/tests/gi-tester	2018-07-28 10:11:39.000000000 +0300
+++ gobject-introspection-1.57.2/tests/gi-tester	2018-08-06 23:20:29.674995053 +0300
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/python3
 
 import io
 import sys