diff -rupN qgis-2.18.20/src/plugins/grass/scripts/db.connect-login.pg.py qgis-2.18.20-new/src/plugins/grass/scripts/db.connect-login.pg.py
--- qgis-2.18.20/src/plugins/grass/scripts/db.connect-login.pg.py	2018-05-18 14:01:08.000000000 +0200
+++ qgis-2.18.20-new/src/plugins/grass/scripts/db.connect-login.pg.py	2018-11-02 13:24:02.276460662 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """
diff -rupN qgis-2.18.20/src/plugins/grass/scripts/qgis.v.kernel.rast.py qgis-2.18.20-new/src/plugins/grass/scripts/qgis.v.kernel.rast.py
--- qgis-2.18.20/src/plugins/grass/scripts/qgis.v.kernel.rast.py	2018-05-18 14:01:08.000000000 +0200
+++ qgis-2.18.20-new/src/plugins/grass/scripts/qgis.v.kernel.rast.py	2018-11-02 13:24:00.489411796 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """
diff -rupN qgis-2.18.20/src/plugins/grass/scripts/qgis.v.upgrade.py qgis-2.18.20-new/src/plugins/grass/scripts/qgis.v.upgrade.py
--- qgis-2.18.20/src/plugins/grass/scripts/qgis.v.upgrade.py	2018-05-18 14:01:08.000000000 +0200
+++ qgis-2.18.20-new/src/plugins/grass/scripts/qgis.v.upgrade.py	2018-11-02 13:23:58.663361863 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """
diff -rupN qgis-2.18.20/src/plugins/grass/scripts/r.external.all.py qgis-2.18.20-new/src/plugins/grass/scripts/r.external.all.py
--- qgis-2.18.20/src/plugins/grass/scripts/r.external.all.py	2018-05-18 14:01:08.000000000 +0200
+++ qgis-2.18.20-new/src/plugins/grass/scripts/r.external.all.py	2018-11-02 13:23:56.175293827 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """
diff -rupN qgis-2.18.20/src/plugins/grass/scripts/v.out.ogr.pg.py qgis-2.18.20-new/src/plugins/grass/scripts/v.out.ogr.pg.py
--- qgis-2.18.20/src/plugins/grass/scripts/v.out.ogr.pg.py	2018-05-18 14:01:08.000000000 +0200
+++ qgis-2.18.20-new/src/plugins/grass/scripts/v.out.ogr.pg.py	2018-11-02 13:23:54.063236074 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python2
 # -*- coding: utf-8 -*-
 
 """