diff --git a/ext/mcpat/regression/regression.py b/ext/mcpat/regression/regression.py
index aabfec75dca4b3d677991ecacec76d83c4d37b18..0115a56256f9bbe68fa167a137c673a25cc267cf 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 c37663c8f2b6d2a53dd460fe03873c962ffbb19a..aaa75929f6aaa32816bb7cd13110a99e0bcbda19 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 bf0d065e483bdaddacd46b584f6c6f5324c883b8..f3591977b6b27ddb93a680be32199658b6638fcb 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 a12e498b21155912431c461952600f12502aa5a5..3461f243e9862b9520c64bf3a5f2723cef633b68 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 a969a6ee46298d93c4fa14b9aae4309ff0dbdb96..19e6442de663ffa1a3c68410926b8dd34b106d02 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/util/batch/job.py b/util/batch/job.py
index 9d7ecca8c903718d31e73b3ba385af5b8f682615..471b882514b18b249b8839e5ac3aa13f5c54868c 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 e7bf1958f51ffa1a9617bab31427817401ac0227..44a4f2879ce0a069c8724fab71b1c5d20409822d 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 530462758d7631957f784be358ce3a7c6e5a0189..bec4709fcd5a9f5f360c40bcf7556d881aa4593d 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 627e78b741cf1178aa2e8a0616d56bb0ba37eaf2..f3040f7949e0f82be0b8197947a9d525c685b389 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 ffd5d701ba82c60f5f412167d20d4a0f85262d06..5102fd5a27959d57807f39941577112d389220f3 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 6e4030146f5b0145b7a8070e6d2074fd9df48b24..956a16133e6a113e8b6eb48f3f285e900fe13082 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 6915e714aa03b9743729e483f9c1861b2afbe081..ff5c73386bb7003cdfe4f1ba32e40cbdbcce265e 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 e9105753d756e07345919e12ecf61f572d285115..2758e96aefbabe13c0ac3c19307c4f16db90f216 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 72e1528c317d6bb525287cb9806f254e6e1dc502..422b14049d504c5eb17f85f45ff91304b8eb87d5 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 f3fc32960dd9979964a203ad870091b00dbcd05d..5eb18b95aae1fa09619135c84156923b5c4cae17 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 e54e82d7010f1cc2310612cf9aa995d1946506f6..d8d5ba1435f52efe9fd5cd8c8b776f9fd89fd990 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 0734d43c8ed22f7aee90d1bc8026ac7a657f1198..c4d4616648aa49741a04a97f0991a7991f659a5d 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 697f4b728796337a8c78aa1d9d668758342caba3..8a12bc3b182f9912716ab03f02d407b97c2e09fe 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/memtest-soak.py b/util/memtest-soak.py
index 2ece09c2186b63b95a0b25757c198ab09c255cc5..b61d1c5b72b78a03b9c4bd8e28655579ad5fcef1 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 1a6b47b011bd83f307770e0ddafb0db8fdf8e1e3..39c63317995c152f848dff187863f68c80641aad 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 4d3a59a2945a90cf6d3d234182195c03c7d00b0f..08fd8d334e7069d1e7badd2f2aff24cb0c0de926 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 aea9dfaddab0a293dd03486e5c404922074011f1..f6444064649f6af4c6bc57d16891c89056547332 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 0fd3b4f9782ea03d21d6e01dceb1b04552271482..4c400310c153227da93fdd709344e6b3e3148858 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 54bba931da5dd320c6678a01e103a180c79cbc3d..62ab2e5b99f1526d0496eb3b74e67b2a8ed49cab 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 e0507cdd46280683f7cf57aea0ab67b3bc24d977..47ac8768f4ab2f0b88cab7a4e7dcb028293657da 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 d53f3e9b18c98b6dc53df0f0300ba2047080e6ef..9ec9b8f520486e814b5668ef1e1121ea34570e18 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 ceaaf739d7f0a527de9fa038a99b9edcb26f3b91..3f44e2f461c3f92dc6759cd1306a4f3eda2adf69 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 07bd73ffaff9a5033844b9efbd156d799c3de430..b4ccec0d8a0f2829bbf0a88c030fa5d5b02711be 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/sort_includes.py b/util/sort_includes.py
index 9cfd5b2c16fa952d49c3d1fcaa72c8d7ae9699c0..f5e953d8495524748aee452705033aa2694e8660 100644
--- a/util/sort_includes.py
+++ b/util/sort_includes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import os
 import re
diff --git a/util/stats/stats.py b/util/stats/stats.py
index ea2210685b4cb10c5ff3c7d4130e6effede335fa..209108c77b06aa052642eca4727c0d28ff63a4a1 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 96b7432f2b723823dbce49103446d4476734a870..a7ecc448cee651b5af99e2ead629df575908cc7b 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 7ee58dfa68d96b3300d3a8f2ad1bd0e9ab7f1e09..3383ee770536207cd1fa3a4c44ca4b4f5fadbc9a 100644
--- a/util/style.py
+++ b/util/style.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python2
 # Copyright (c) 2014 ARM Limited
 # All rights reserved
 #