diff --git a/apply_issue.bat b/apply_issue.bat
index 30bc306bc..2a035062b 100755
--- a/apply_issue.bat
+++ b/apply_issue.bat
@@ -4,9 +4,5 @@
 :: found in the LICENSE file.
 setlocal
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-python "%~dp0\apply_issue.py" %*
+%~dp0python "%~dp0\apply_issue.py" %*
diff --git a/cit.bat b/cit.bat
index 82919b936..8f79044aa 100755
--- a/cit.bat
+++ b/cit.bat
@@ -1,12 +1,8 @@
-@echo off
-:: Copyright (c) 2015 The Chromium Authors. All rights reserved.
-:: Use of this source code is governed by a BSD-style license that can be
-:: found in the LICENSE file.
-setlocal
-
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
-:: Defer control.
-python "%~dp0\cit.py" %*
+@echo off
+:: Copyright (c) 2015 The Chromium Authors. All rights reserved.
+:: Use of this source code is governed by a BSD-style license that can be
+:: found in the LICENSE file.
+setlocal
+
+:: Defer control.
+%~dp0python "%~dp0\cit.py" %*
diff --git a/clang-format.bat b/clang-format.bat
index c3bb53bc4..884cd246a 100644
--- a/clang-format.bat
+++ b/clang-format.bat
@@ -4,9 +4,5 @@
 :: found in the LICENSE file.
 setlocal
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-python "%~dp0\clang_format.py" %*
+%~dp0python "%~dp0\clang_format.py" %*
diff --git a/clang_format_merge_driver.bat b/clang_format_merge_driver.bat
index 8e614b492..6f15dd749 100755
--- a/clang_format_merge_driver.bat
+++ b/clang_format_merge_driver.bat
@@ -1,12 +1,8 @@
-@echo off
-:: Copyright 2016 The Chromium Authors. All rights reserved.
-:: Use of this source code is governed by a BSD-style license that can be
-:: found in the LICENSE file.
-setlocal
-
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
-:: Defer control.
-python "%~dp0\clang_format_merge_driver.py" %*
+@echo off
+:: Copyright 2016 The Chromium Authors. All rights reserved.
+:: Use of this source code is governed by a BSD-style license that can be
+:: found in the LICENSE file.
+setlocal
+
+:: Defer control.
+%~dp0python "%~dp0\clang_format_merge_driver.py" %*
diff --git a/commit_queue.bat b/commit_queue.bat
index 44639a64d..c1babf04c 100755
--- a/commit_queue.bat
+++ b/commit_queue.bat
@@ -4,9 +4,5 @@
 :: found in the LICENSE file.
 setlocal
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-python "%~dp0\commit_queue.py" %*
+%~dp0python "%~dp0\commit_queue.py" %*
diff --git a/cpplint.bat b/cpplint.bat
index 30faf8bbb..914eecf1a 100644
--- a/cpplint.bat
+++ b/cpplint.bat
@@ -1,11 +1,4 @@
 @echo off
-:: Copyright 2016 The Chromium Authors. All rights reserved.
-:: Use of this source code is governed by a BSD-style license that can be
-:: found in the LICENSE file.
 setlocal
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 call python "%~dp0cpplint.py" %*
diff --git a/depot-tools-auth.bat b/depot-tools-auth.bat
index 37280b765..4770ed6fb 100644
--- a/depot-tools-auth.bat
+++ b/depot-tools-auth.bat
@@ -4,9 +4,5 @@
 :: found in the LICENSE file.
 setlocal
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-python "%~dp0\depot-tools-auth.py" %*
+%~dp0python "%~dp0\depot-tools-auth.py" %*
diff --git a/download_from_google_storage.bat b/download_from_google_storage.bat
index f1f2d2161..4c7971b42 100755
--- a/download_from_google_storage.bat
+++ b/download_from_google_storage.bat
@@ -2,11 +2,6 @@
 :: Copyright (c) 2012 The Chromium Authors. All rights reserved.
 :: Use of this source code is governed by a BSD-style license that can be
 :: found in the LICENSE file.
-setlocal
-
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
 
 :: Defer control.
-python "%~dp0\download_from_google_storage.py" %*
+%~dp0python "%~dp0\download_from_google_storage.py" %*
diff --git a/fetch.bat b/fetch.bat
index 5f8019a19..d6ea944e2 100755
--- a/fetch.bat
+++ b/fetch.bat
@@ -7,9 +7,5 @@ setlocal
 :: Synchronize the root directory before deferring control back to gclient.py.
 call "%~dp0\update_depot_tools.bat"
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-python "%~dp0\fetch.py" %*
+%~dp0python "%~dp0\fetch.py" %*
diff --git a/gclient.bat b/gclient.bat
index 3d2fe2627..d66ce6a41 100755
--- a/gclient.bat
+++ b/gclient.bat
@@ -7,9 +7,5 @@ setlocal
 :: Synchronize the root directory before deferring control back to gclient.py.
 call "%~dp0update_depot_tools.bat" %*
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-"python" "%~dp0gclient.py" %*
+"%~dp0python" "%~dp0gclient.py" %*
diff --git a/gn.bat b/gn.bat
index 9eb6b56a1..0a42a0766 100644
--- a/gn.bat
+++ b/gn.bat
@@ -4,9 +4,5 @@
 :: found in the LICENSE file.
 setlocal
 
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
 :: Defer control.
-python "%~dp0\gn.py" %*
+%~dp0python "%~dp0\gn.py" %*
diff --git a/roll-dep-svn.bat b/roll-dep-svn.bat
index 6ff5db78f..b2aec795e 100755
--- a/roll-dep-svn.bat
+++ b/roll-dep-svn.bat
@@ -1,12 +1,7 @@
-@echo off
-:: Copyright (c) 2012 The Chromium Authors. All rights reserved.
-:: Use of this source code is governed by a BSD-style license that can be
-:: found in the LICENSE file.
-setlocal
-
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
-
-:: Defer control.
-python "%~dp0\roll_dep_svn.py" %*
+@echo off
+:: Copyright (c) 2012 The Chromium Authors. All rights reserved.
+:: Use of this source code is governed by a BSD-style license that can be
+:: found in the LICENSE file.
+
+:: Defer control.
+%~dp0python "%~dp0\roll_dep_svn.py" %*
diff --git a/roll-dep.bat b/roll-dep.bat
index c49c88dc5..d5166dfa8 100755
--- a/roll-dep.bat
+++ b/roll-dep.bat
@@ -2,11 +2,6 @@
 :: Copyright (c) 2012 The Chromium Authors. All rights reserved.
 :: Use of this source code is governed by a BSD-style license that can be
 :: found in the LICENSE file.
-setlocal
-
-:: Ensure that "depot_tools" is somewhere in PATH so this tool can be used
-:: standalone, but allow other PATH manipulations to take priority.
-set PATH=%PATH%;%~dp0
 
 :: Defer control.
-python "%~dp0\roll_dep.py" %*
+%~dp0python "%~dp0\roll_dep.py" %*