diff --git a/ext/mcpat/regression/regression.py b/ext/mcpat/regression/regression.py
index aabfec75d..0115a5625 100755
--- a/ext/mcpat/regression/regression.py
+++ b/ext/mcpat/regression/regression.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # 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 c37663c8f..aaa75929f 100644
--- a/ext/mcpat/regression/verify_output.py
+++ b/ext/mcpat/regression/verify_output.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # 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 bf0d065e4..f3591977b 100755
--- a/ext/ply/example/classcalc/calc.py
+++ b/ext/ply/example/classcalc/calc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # -----------------------------------------------------------------------------
 # calc.py
diff --git a/ext/ply/example/newclasscalc/calc.py b/ext/ply/example/newclasscalc/calc.py
index a12e498b2..3461f243e 100755
--- a/ext/ply/example/newclasscalc/calc.py
+++ b/ext/ply/example/newclasscalc/calc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # -----------------------------------------------------------------------------
 # calc.py
diff --git a/src/unittest/genini.py b/src/unittest/genini.py
index a969a6ee4..19e6442de 100755
--- a/src/unittest/genini.py
+++ b/src/unittest/genini.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Copyright (c) 2005 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/tests/testing/__init__.py b/tests/testing/__init__.py
index e7c83da10..1bc471108 100644
--- a/tests/testing/__init__.py
+++ b/tests/testing/__init__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/helpers.py b/tests/testing/helpers.py
index 757167a4b..e2f3fbe7d 100755
--- a/tests/testing/helpers.py
+++ b/tests/testing/helpers.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/results.py b/tests/testing/results.py
index 1df14bc4f..387362a75 100644
--- a/tests/testing/results.py
+++ b/tests/testing/results.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/tests.py b/tests/testing/tests.py
index 6f887ff80..c9a2a06b2 100644
--- a/tests/testing/tests.py
+++ b/tests/testing/tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/testing/units.py b/tests/testing/units.py
index 6214c8f14..808763fcc 100644
--- a/tests/testing/units.py
+++ b/tests/testing/units.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/tests/tests.py b/tests/tests.py
index 85b194c56..136c879aa 100755
--- a/tests/tests.py
+++ b/tests/tests.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/batch/job.py b/util/batch/job.py
index 9d7ecca8c..471b88251 100755
--- a/util/batch/job.py
+++ b/util/batch/job.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # 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 e7bf1958f..44a4f2879 100755
--- a/util/batch/send.py
+++ b/util/batch/send.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # 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 530462758..bec4709fc 100755
--- a/util/checkpoint-tester.py
+++ b/util/checkpoint-tester.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 
 # Copyright (c) 2010 Advanced Micro Devices, Inc.
 # All rights reserved.
diff --git a/util/compile b/util/compile
index 627e78b74..f3040f794 100755
--- a/util/compile
+++ b/util/compile
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # 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 ffd5d701b..5102fd5a2 100755
--- a/util/cpt_upgrader.py
+++ b/util/cpt_upgrader.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2012-2013,2015 ARM Limited
 # All rights reserved
diff --git a/util/decode_inst_dep_trace.py b/util/decode_inst_dep_trace.py
index 6e4030146..956a16133 100755
--- a/util/decode_inst_dep_trace.py
+++ b/util/decode_inst_dep_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2013 - 2015 ARM Limited
 # All rights reserved
diff --git a/util/decode_inst_trace.py b/util/decode_inst_trace.py
index 6915e714a..ff5c73386 100755
--- a/util/decode_inst_trace.py
+++ b/util/decode_inst_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2013-2014 ARM Limited
 # All rights reserved
diff --git a/util/decode_packet_trace.py b/util/decode_packet_trace.py
index 97d344163..34a0d8bbc 100755
--- a/util/decode_packet_trace.py
+++ b/util/decode_packet_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2013-2014 ARM Limited
 # All rights reserved
diff --git a/util/dram_lat_mem_rd_plot.py b/util/dram_lat_mem_rd_plot.py
index 72e1528c3..422b14049 100755
--- a/util/dram_lat_mem_rd_plot.py
+++ b/util/dram_lat_mem_rd_plot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2015 ARM Limited
 # All rights reserved
diff --git a/util/dram_sweep_plot.py b/util/dram_sweep_plot.py
index f3fc32960..5eb18b95a 100755
--- a/util/dram_sweep_plot.py
+++ b/util/dram_sweep_plot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2014 ARM Limited
 # All rights reserved
diff --git a/util/encode_inst_dep_trace.py b/util/encode_inst_dep_trace.py
index e54e82d70..d8d5ba143 100755
--- a/util/encode_inst_dep_trace.py
+++ b/util/encode_inst_dep_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2015 ARM Limited
 # All rights reserved
diff --git a/util/encode_packet_trace.py b/util/encode_packet_trace.py
index 0734d43c8..c4d461664 100755
--- a/util/encode_packet_trace.py
+++ b/util/encode_packet_trace.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2013-2014 ARM Limited
 # All rights reserved
diff --git a/util/find_copyrights.py b/util/find_copyrights.py
index 697f4b728..8a12bc3b1 100644
--- a/util/find_copyrights.py
+++ b/util/find_copyrights.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import os
 import re
diff --git a/util/git-pre-commit.py b/util/git-pre-commit.py
index 276e21fc5..1b93069da 100755
--- a/util/git-pre-commit.py
+++ b/util/git-pre-commit.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/hgstyle.py b/util/hgstyle.py
index ecdec4b0f..da0cdeb90 100755
--- a/util/hgstyle.py
+++ b/util/hgstyle.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 # Copyright (c) 2014 ARM Limited
 # All rights reserved
 #
diff --git a/util/maint/git-patch-to-hg-patch b/util/maint/git-patch-to-hg-patch
index 6819cfcce..1b9e05d09 100755
--- a/util/maint/git-patch-to-hg-patch
+++ b/util/maint/git-patch-to-hg-patch
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # This file originated from the moz-git-tools repo on GitHub
 # (https://github.com/mozilla/moz-git-tools), which contains the
diff --git a/util/memtest-soak.py b/util/memtest-soak.py
index 2ece09c21..b61d1c5b7 100755
--- a/util/memtest-soak.py
+++ b/util/memtest-soak.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 
 # Copyright (c) 2015 ARM Limited
 # All rights reserved
diff --git a/util/minorview.py b/util/minorview.py
index 1a6b47b01..39c633179 100755
--- a/util/minorview.py
+++ b/util/minorview.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2013 ARM Limited
 # All rights reserved
diff --git a/util/o3-pipeview.py b/util/o3-pipeview.py
index 4d3a59a29..08fd8d334 100755
--- a/util/o3-pipeview.py
+++ b/util/o3-pipeview.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 
 # Copyright (c) 2011 ARM Limited
 # All rights reserved
diff --git a/util/oprofile-top.py b/util/oprofile-top.py
index aea9dfadd..f64440646 100755
--- a/util/oprofile-top.py
+++ b/util/oprofile-top.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 
 # 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 0fd3b4f97..4c400310c 100755
--- a/util/pbs/job.py
+++ b/util/pbs/job.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # 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 54bba931d..62ab2e5b9 100755
--- a/util/pbs/send.py
+++ b/util/pbs/send.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Copyright (c) 2005 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/protolib.py b/util/protolib.py
index e0507cdd4..47ac8768f 100644
--- a/util/protolib.py
+++ b/util/protolib.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2013 ARM Limited
 # All rights reserved
diff --git a/util/qdo b/util/qdo
index d53f3e9b1..9ec9b8f52 100755
--- a/util/qdo
+++ b/util/qdo
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 
 # Copyright (c) 2004-2005, 2007 The Regents of The University of Michigan
 # All rights reserved.
diff --git a/util/regress b/util/regress
index 5cc576b5d..da71e6575 100755
--- a/util/regress
+++ b/util/regress
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 # Copyright (c) 2005-2007 The Regents of The University of Michigan
 # All rights reserved.
 #
diff --git a/util/slicc b/util/slicc
index 07bd73ffa..b4ccec0d8 100755
--- a/util/slicc
+++ b/util/slicc
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Copyright (c) 2009 The Hewlett-Packard Development Company
 # All rights reserved.
 #
diff --git a/util/stats/stats.py b/util/stats/stats.py
index ea2210685..209108c77 100755
--- a/util/stats/stats.py
+++ b/util/stats/stats.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # 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 c65649e79..816d042dc 100755
--- a/util/streamline/m5stats2streamline.py
+++ b/util/streamline/m5stats2streamline.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # Copyright (c) 2012, 2014 ARM Limited
 # All rights reserved
diff --git a/util/style.py b/util/style.py
index 15a99c895..1dd7af34e 100755
--- a/util/style.py
+++ b/util/style.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/style/__init__.py b/util/style/__init__.py
index e7c83da10..1bc471108 100644
--- a/util/style/__init__.py
+++ b/util/style/__init__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/style/repo.py b/util/style/repo.py
index adcbdc95f..7e3b444c6 100644
--- a/util/style/repo.py
+++ b/util/style/repo.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2016 ARM Limited
 # All rights reserved
diff --git a/util/style/sort_includes.py b/util/style/sort_includes.py
index a35b08468..d1a25ee6b 100644
--- a/util/style/sort_includes.py
+++ b/util/style/sort_includes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2014-2015 ARM Limited
 # All rights reserved
diff --git a/util/style/style.py b/util/style/style.py
index 9f3f0d0f0..317caa395 100644
--- a/util/style/style.py
+++ b/util/style/style.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 # Copyright (c) 2014, 2016 ARM Limited
 # All rights reserved
 #
diff --git a/util/style/verifiers.py b/util/style/verifiers.py
index 1be453601..89247dc4f 100644
--- a/util/style/verifiers.py
+++ b/util/style/verifiers.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #
 # Copyright (c) 2014, 2016 ARM Limited
 # All rights reserved