--- a/apt.py	Sat Aug 24 15:07:34 2024 -0700
+++ b/apt.py	Mon Sep 16 20:10:00 2024 -0700
@@ -60,7 +60,7 @@
     dir / 'raspi.list',
 ]):
     found = map(Path, cast(str, host.get_fact(FindFiles, dir, quote_path=True)))
-    if set(found) - set(known):
+    if set(found) - set(known) - {dir / 'ubuntu.sources'}:
         raise SystemExit(f"new files in {host.name} /etc/apt/sources.list.d/ - please remove")
     for f in known:
         files.file(path=f, present=False)
@@ -72,6 +72,9 @@
 
     files.template(src='templates/sources.list.j2', dest='/etc/apt/sources.list')
 
+    if 'big' in host.groups or 'laptop' in host.groups or 'hosted' in host.groups:
+        files.template(src='templates/ubuntu.sources.j2', dest='/etc/apt/sources.list.d/ubuntu.sources')
+
     clear_known_sources_files()
     apt.packages(update=True,
                  cache_time=86400,