diff -up hplip-3.18.12/scan.py.scan-tmp hplip-3.18.12/scan.py

--- hplip-3.18.12/scan.py.scan-tmp	2019-01-08 12:48:20.194815147 +0100

+++ hplip-3.18.12/scan.py	2019-01-08 12:50:47.942620000 +0100

@@ -1887,7 +1887,7 @@ try:

         if ('editor' in dest or 'viewer' in dest or 'email' in dest or 'print' in dest) \

             and not file_saved:

-            output_fd, output = utils.make_temp_file(suffix='.png')

+            output_fd, output = utils.make_temp_file(dir='/var/tmp', suffix='.png')

             try:

                 '''pyPlatform = platform.python_version()

                 num = pyPlatform.split('.')

diff -up hplip-3.18.12/scan/sane.py.scan-tmp hplip-3.18.12/scan/sane.py

--- hplip-3.18.12/scan/sane.py.scan-tmp	2018-12-03 08:10:22.000000000 +0100

+++ hplip-3.18.12/scan/sane.py	2019-01-08 12:48:20.194815147 +0100

@@ -425,7 +425,8 @@ class ScanThread(threading.Thread):

         self.dev = device

         self.update_queue = update_queue

         self.event_queue = event_queue

-        self.buffer_fd, self.buffer_path = utils.make_temp_file(prefix='hpscan')

+        self.buffer_fd, self.buffer_path = utils.make_temp_file(dir='/var/tmp',

+                                                                prefix='hpscan')

         self.buffer = os.fdopen(self.buffer_fd, "w+b")

         self.format = -1

         self.format_name = ''