--- old/a2x.py	2013-11-06 01:31:10.000000000 +0100
+++ new/a2x.py	2019-08-14 08:49:48.534091081 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 '''
 a2x - A toolchain manager for AsciiDoc (converts Asciidoc text files to other
       file formats)
--- old/asciidoc.py	2013-11-06 22:33:00.000000000 +0100
+++ new/asciidoc.py	2019-08-14 08:49:48.538091012 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 """
 asciidoc - converts an AsciiDoc text file to HTML or DocBook
 
--- old/asciidocapi.py	2012-09-28 01:34:02.000000000 +0200
+++ new/asciidocapi.py	2019-08-14 08:49:48.534091081 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 """
 asciidocapi - AsciiDoc API wrapper class.
 
--- old/filters/code/code-filter.py	2012-12-28 21:34:11.000000000 +0100
+++ new/filters/code/code-filter.py	2019-08-14 08:49:48.538091012 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 '''
 NAME
     code-filter - AsciiDoc filter to highlight language keywords
--- old/filters/graphviz/graphviz2png.py	2011-01-31 21:52:09.000000000 +0100
+++ new/filters/graphviz/graphviz2png.py	2019-08-14 08:49:48.538091012 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 
 import os, sys, subprocess
 from optparse import *
--- old/filters/latex/latex2png.py	2012-02-29 03:05:58.000000000 +0100
+++ new/filters/latex/latex2png.py	2019-08-14 08:49:48.538091012 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 '''
 NAME
     latex2png - Converts LaTeX source to PNG file
--- old/filters/music/music2png.py	2012-07-10 23:32:19.000000000 +0200
+++ new/filters/music/music2png.py	2019-08-14 08:49:48.538091012 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 '''
 NAME
     music2png - Converts textual music notation to classically notated PNG file
--- old/tests/testasciidoc.py	2012-12-31 01:34:30.000000000 +0100
+++ new/tests/testasciidoc.py	2019-08-14 08:49:48.538091012 +0200
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/bin/python2.7
 
 USAGE = '''Usage: testasciidoc.py [OPTIONS] COMMAND