diff --git a/pungi/scripts/patch_iso.py b/pungi/scripts/patch_iso.py
index 40d7f858..406a15e3 100644
--- a/pungi/scripts/patch_iso.py
+++ b/pungi/scripts/patch_iso.py
@@ -33,6 +33,9 @@ def main(args=None):
     parser.add_argument(
         "--force-arch", help="Treat the ISO as bootable on given architecture"
     )
+    parser.add_argument(
+        "--work-dir", help="Set custom working directory. Default: /tmp/", default=None
+    )
     parser.add_argument(
         "target", metavar="TARGET_ISO", help="which file to write the result to"
     )
diff --git a/pungi_utils/patch_iso.py b/pungi_utils/patch_iso.py
index 8d3f9d1f..8a9d94d4 100644
--- a/pungi_utils/patch_iso.py
+++ b/pungi_utils/patch_iso.py
@@ -79,7 +79,7 @@ def run(log, opts):
     log.info("Mounting %s", opts.source)
     target = os.path.abspath(opts.target)
 
-    with util.temp_dir(prefix="patch-iso-") as work_dir:
+    with util.temp_dir(prefix="patch-iso-", dir=opts.work_dir) as work_dir:
         with iso.mount(opts.source) as source_iso_dir:
             util.copy_all(source_iso_dir, work_dir)