diff --git a/setup/git_post_checkout_hook.py b/setup/git_post_checkout_hook.py
index 1d4b7213cb..24e393ed9b 100755
--- a/setup/git_post_checkout_hook.py
+++ b/setup/git_post_checkout_hook.py
@@ -9,15 +9,19 @@ __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 import os, subprocess, sys
 
 prev_rev, current_rev, flags = [x.decode('utf-8') if isinstance(x, bytes) else x for x in sys.argv[1:]]
+
+
 def get_branch_name(rev):
     return subprocess.check_output(['git', 'name-rev', '--name-only', rev]).decode('utf-8').strip()
+
+
 base = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
 os.chdir(base)
 
 if flags == '1':  # A branch checkout
     prev_branch, cur_branch = map(get_branch_name, (prev_rev, current_rev))
 
-    subprocess.check_call(['python', 'setup.py', 'gui', '--summary'])
+    subprocess.check_call([sys.executable, 'setup.py', 'gui', '--summary'])
 
     # Remove .pyc files as some of them might have been orphaned
     for dirpath, dirnames, filenames in os.walk('.'):
@@ -25,4 +29,3 @@ if flags == '1':  # A branch checkout
             fpath = os.path.join(dirpath, f)
             if f.endswith('.pyc'):
                 os.remove(fpath)
-
diff --git a/setup/git_post_rewrite_hook.py b/setup/git_post_rewrite_hook.py
index a28f2a62b9..c989a70032 100755
--- a/setup/git_post_rewrite_hook.py
+++ b/setup/git_post_rewrite_hook.py
@@ -14,6 +14,4 @@ os.chdir(base)
 action = [x.decode('utf-8') if isinstance(x, bytes) else x for x in sys.argv[1:]][0]
 
 if action == 'rebase':
-    subprocess.check_call(['python', 'setup.py', 'gui'])
-
-
+    subprocess.check_call([sys.executable, 'setup.py', 'gui'])