diff --git a/ext/mcpat/regression/regression.py b/ext/mcpat/regression/regression.py
index 0115a56..ddfa81b 100755
--- a/ext/mcpat/regression/regression.py
+++ b/ext/mcpat/regression/regression.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2010-2013 Advanced Micro Devices, Inc.
 # All rights reserved.
diff --git a/ext/mcpat/regression/verify_output.py b/ext/mcpat/regression/verify_output.py
index aaa7592..83e3e89 100644
--- a/ext/mcpat/regression/verify_output.py
+++ b/ext/mcpat/regression/verify_output.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2010-2013 Advanced Micro Devices, Inc.
 # All rights reserved.
diff --git a/ext/ply/example/classcalc/calc.py b/ext/ply/example/classcalc/calc.py
index f359197..b0712fc 100755
--- a/ext/ply/example/classcalc/calc.py
+++ b/ext/ply/example/classcalc/calc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # -----------------------------------------------------------------------------
 # calc.py
diff --git a/ext/ply/example/newclasscalc/calc.py b/ext/ply/example/newclasscalc/calc.py
index 3461f24..5a8db84 100755
--- a/ext/ply/example/newclasscalc/calc.py
+++ b/ext/ply/example/newclasscalc/calc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # -----------------------------------------------------------------------------
 # calc.py
diff --git a/src/systemc/tests/verify.py b/src/systemc/tests/verify.py
index def0fdc..503c11d 100755
--- a/src/systemc/tests/verify.py
+++ b/src/systemc/tests/verify.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright 2018 Google, Inc.
 #
diff --git a/src/unittest/genini.py b/src/unittest/genini.py
index 5a4f345..f10ad68 100755
--- a/src/unittest/genini.py
+++ b/src/unittest/genini.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2005 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/tests/main.py b/tests/main.py
index c8dc9b9..509724e 100755
--- a/tests/main.py
+++ b/tests/main.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 '''
 The main source for testlib. Ties together the default test runners and
 loaders.
diff --git a/tests/testing/__init__.py b/tests/testing/__init__.py
index 1bc4711..4230079 100644
--- a/tests/testing/__init__.py
+++ b/tests/testing/__init__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/helpers.py b/tests/testing/helpers.py
index 29c6bf5..70e6dfb 100755
--- a/tests/testing/helpers.py
+++ b/tests/testing/helpers.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/results.py b/tests/testing/results.py
index 4e07078..8cb3811 100644
--- a/tests/testing/results.py
+++ b/tests/testing/results.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/tests.py b/tests/testing/tests.py
index 123d3b1..00f3e5a 100755
--- a/tests/testing/tests.py
+++ b/tests/testing/tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016-2017 ARM Limited
 # All rights reserved
diff --git a/tests/testing/units.py b/tests/testing/units.py
index 220cf61..90918ae 100644
--- a/tests/testing/units.py
+++ b/tests/testing/units.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/tests.py b/tests/tests.py
index a57a972..9967669 100755
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/batch/job.py b/util/batch/job.py
index 471b882..02e1fdc 100755
--- a/util/batch/job.py
+++ b/util/batch/job.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2006 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/batch/send.py b/util/batch/send.py
index 44a4f28..7707a0e 100755
--- a/util/batch/send.py
+++ b/util/batch/send.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2006 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/checkpoint-tester.py b/util/checkpoint-tester.py
index bec4709..e7bd45e 100755
--- a/util/checkpoint-tester.py
+++ b/util/checkpoint-tester.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 
 # Copyright (c) 2010 Advanced Micro Devices, Inc.
 # All rights reserved.
diff --git a/util/compile b/util/compile
index f3040f7..a069f55 100755
--- a/util/compile
+++ b/util/compile
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2006 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/cpt_upgrader.py b/util/cpt_upgrader.py
index 59a4689..29a3413 100755
--- a/util/cpt_upgrader.py
+++ b/util/cpt_upgrader.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2012-2013,2015-2016 ARM Limited
 # All rights reserved
diff --git a/util/decode_inst_dep_trace.py b/util/decode_inst_dep_trace.py
index 956a161..5e89001 100755
--- a/util/decode_inst_dep_trace.py
+++ b/util/decode_inst_dep_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2013 - 2015 ARM Limited
 # All rights reserved
diff --git a/util/decode_inst_trace.py b/util/decode_inst_trace.py
index ff5c733..d8299b0 100755
--- a/util/decode_inst_trace.py
+++ b/util/decode_inst_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2013-2014 ARM Limited
 # All rights reserved
diff --git a/util/decode_packet_trace.py b/util/decode_packet_trace.py
index 9ef9b5f..6a4b386 100755
--- a/util/decode_packet_trace.py
+++ b/util/decode_packet_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2013-2014 ARM Limited
 # All rights reserved
diff --git a/util/encode_inst_dep_trace.py b/util/encode_inst_dep_trace.py
index d8d5ba1..ba8ca91 100755
--- a/util/encode_inst_dep_trace.py
+++ b/util/encode_inst_dep_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2015 ARM Limited
 # All rights reserved
diff --git a/util/encode_packet_trace.py b/util/encode_packet_trace.py
index c4d4616..0480714 100755
--- a/util/encode_packet_trace.py
+++ b/util/encode_packet_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2013-2014 ARM Limited
 # All rights reserved
diff --git a/util/find_copyrights.py b/util/find_copyrights.py
index 8a12bc3..39ac191 100644
--- a/util/find_copyrights.py
+++ b/util/find_copyrights.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 import os
 import re
diff --git a/util/gen_arm_fs_files.py b/util/gen_arm_fs_files.py
index bb8449a..45c36ee 100755
--- a/util/gen_arm_fs_files.py
+++ b/util/gen_arm_fs_files.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2017-2018 Metempsy Technology Consulting
 # All rights reserved.
diff --git a/util/git-pre-commit.py b/util/git-pre-commit.py
index 1b93069..db515f5 100755
--- a/util/git-pre-commit.py
+++ b/util/git-pre-commit.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/hgstyle.py b/util/hgstyle.py
index da0cdeb..9e199b7 100755
--- a/util/hgstyle.py
+++ b/util/hgstyle.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 # Copyright (c) 2014 ARM Limited
 # All rights reserved
 #
diff --git a/util/maint/list_changes.py b/util/maint/list_changes.py
index 3d9be8d..c27aab1 100755
--- a/util/maint/list_changes.py
+++ b/util/maint/list_changes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2017-2018 Arm Limited
 # All rights reserved
diff --git a/util/maint/show_changes_by_file.py b/util/maint/show_changes_by_file.py
index f4f9a96..cc863ce 100755
--- a/util/maint/show_changes_by_file.py
+++ b/util/maint/show_changes_by_file.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2018 Advanced Micro Devices, Inc.
 # All rights reserved.
diff --git a/util/memtest-soak.py b/util/memtest-soak.py
index b61d1c5..3913b0d 100755
--- a/util/memtest-soak.py
+++ b/util/memtest-soak.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 
 # Copyright (c) 2015 ARM Limited
 # All rights reserved
diff --git a/util/minorview.py b/util/minorview.py
index 39c6331..87f9c72 100755
--- a/util/minorview.py
+++ b/util/minorview.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2013 ARM Limited
 # All rights reserved
diff --git a/util/o3-pipeview.py b/util/o3-pipeview.py
index 08fd8d3..fedafd4 100755
--- a/util/o3-pipeview.py
+++ b/util/o3-pipeview.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 
 # Copyright (c) 2011 ARM Limited
 # All rights reserved
diff --git a/util/oprofile-top.py b/util/oprofile-top.py
index f644406..b678dd6 100755
--- a/util/oprofile-top.py
+++ b/util/oprofile-top.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 
 # Copyright (c) 2005 The Regents of The University of Michigan
 # All rights reserved.
diff --git a/util/pbs/job.py b/util/pbs/job.py
index 4c40031..8247218 100755
--- a/util/pbs/job.py
+++ b/util/pbs/job.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2005 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/pbs/send.py b/util/pbs/send.py
index 62ab2e5..d513650 100755
--- a/util/pbs/send.py
+++ b/util/pbs/send.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2005 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/plot_dram/dram_lat_mem_rd_plot.py b/util/plot_dram/dram_lat_mem_rd_plot.py
index 422b140..bdfc3b4 100755
--- a/util/plot_dram/dram_lat_mem_rd_plot.py
+++ b/util/plot_dram/dram_lat_mem_rd_plot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2015 ARM Limited
 # All rights reserved
diff --git a/util/plot_dram/dram_sweep_plot.py b/util/plot_dram/dram_sweep_plot.py
index 5eb18b9..3cef209 100755
--- a/util/plot_dram/dram_sweep_plot.py
+++ b/util/plot_dram/dram_sweep_plot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2014 ARM Limited
 # All rights reserved
diff --git a/util/protolib.py b/util/protolib.py
index 1e442f1..5010483 100644
--- a/util/protolib.py
+++ b/util/protolib.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2013 ARM Limited
 # All rights reserved
diff --git a/util/qdo b/util/qdo
index 9ec9b8f..8008a40 100755
--- a/util/qdo
+++ b/util/qdo
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 
 # Copyright (c) 2004-2005, 2007 The Regents of The University of Michigan
 # All rights reserved.
diff --git a/util/regress b/util/regress
index da71e65..873d9cc 100755
--- a/util/regress
+++ b/util/regress
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 # Copyright (c) 2005-2007 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/slicc b/util/slicc
index b4ccec0..e8408f1 100755
--- a/util/slicc
+++ b/util/slicc
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 # Copyright (c) 2009 The Hewlett-Packard Development Company
 # All rights reserved.
 #
diff --git a/util/stats/stats.py b/util/stats/stats.py
index 209108c..6650f0e 100755
--- a/util/stats/stats.py
+++ b/util/stats/stats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2003-2004 The Regents of The University of Michigan
 # All rights reserved.
diff --git a/util/streamline/m5stats2streamline.py b/util/streamline/m5stats2streamline.py
index 816d042..98aa1a8 100755
--- a/util/streamline/m5stats2streamline.py
+++ b/util/streamline/m5stats2streamline.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 
 # Copyright (c) 2012, 2014 ARM Limited
 # All rights reserved
diff --git a/util/style.py b/util/style.py
index 1dd7af3..44e53fd 100755
--- a/util/style.py
+++ b/util/style.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/style/__init__.py b/util/style/__init__.py
index 1bc4711..4230079 100644
--- a/util/style/__init__.py
+++ b/util/style/__init__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/style/repo.py b/util/style/repo.py
index 7e3b444..d344405 100644
--- a/util/style/repo.py
+++ b/util/style/repo.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/style/sort_includes.py b/util/style/sort_includes.py
index 39b3a13..1838925 100644
--- a/util/style/sort_includes.py
+++ b/util/style/sort_includes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2014-2015 ARM Limited
 # All rights reserved
diff --git a/util/style/style.py b/util/style/style.py
index 0f58590..1e35a7b 100644
--- a/util/style/style.py
+++ b/util/style/style.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python2
+#! /usr/bin/env python2.7
 # Copyright (c) 2014, 2016 ARM Limited
 # All rights reserved
 #
diff --git a/util/style/verifiers.py b/util/style/verifiers.py
index 89247dc..33b127a 100644
--- a/util/style/verifiers.py
+++ b/util/style/verifiers.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python2.7
 #
 # Copyright (c) 2014, 2016 ARM Limited
 # All rights reserved