diff --git a/make.py b/make.py
index 5c9088545bebf5369ebc5dd0adcde4d1ae238366..f5f97cdb25d21a45281d1644d7ed1e3d268261c0 100644
--- a/make.py
+++ b/make.py
@@ -6,12 +6,14 @@ Run when
  - their README.md is changed
 """
 from __future__ import print_function, absolute_import, division
+
 import os
 import os.path
 import sys
 
 PREFIX = 'henrietta/'
 
+
 def readfile(path, prefix=None, lines=False, strip=True):
     if prefix is not None:
         path = os.path.join(prefix, path)
@@ -27,6 +29,7 @@ def readfile(path, prefix=None, lines=False, strip=True):
                 d = d.strip()
         return d
 
+
 def writefile(content, path, prefix=None):
     if prefix is not None:
         path = os.path.join(prefix, path)
@@ -37,9 +40,10 @@ def writefile(content, path, prefix=None):
         for piece in content:
             f.write(piece)
 
+
 if __name__ == '__main__':
     dirs = [dir for dir in os.listdir('.') if os.path.isdir(dir) or (dir != '.git')]
-    exi = lambda box, sup: os.path.exists(os.path.join(box, 'build%s.sh' % (sup, )))
+    exi = lambda box, sup: os.path.exists(os.path.join(box, 'build%s.sh' % (sup,)))
     boxes = [box for box in dirs if exi(box, '') or exi(box, '_as_vagrant')]
 
     if len(sys.argv) == 1:
@@ -142,7 +146,7 @@ build_$BOX:
     }]
 }
 '''.replace('$DESCRIPTION', description).replace('$BOX', box).replace('$PREFIX', PREFIX).replace('$VERSION', VERSION),
-    'metadata.json')
+                  'metadata.json')
 
     if len(sys.argv) == 3:
         if sys.argv[-2] == 'newbox':
@@ -175,4 +179,3 @@ content of Vagrantfile that will refer to this box.
 # You can delete it if you want to.
 # cd into a directory if you depend on a particular working directory.
 ''', 'build_as_vagrant.sh', box)
-