details on the am ui

howto/prometheus.md

@@ -578,9 +578,10 @@ And that is only what was available at the time of writing, the
 
 The Alertmanager has its own web interface to see and silence alerts,
 but there are also alternatives like [Karma](https://karma-dashboard.io/). The web interface is
-not shipped with the Debian package, and needs to be built by hand
-(and only in newer, post buster versions). Another alternative to
-consider is [Crochet](https://github.com/simonpasquier/crochet).
+not shipped with the Debian package, because it depends on the [Elm
+compiler](https://github.com/elm/compiler) which is [not in Debian](http://bugs.debian.org/973915). It can be built by hand
+using the `debian/generate-ui.sh` script, but only in newer, post
+buster versions. Another alternative to consider is [Crochet](https://github.com/simonpasquier/crochet).
 
 In general, when working on alerting, keeping [the "My Philosophy on
 Alerting" paper from a Google engineer](https://docs.google.com/document/d/199PqyG3UsyXlwieHaqbGiWVa8eMWi8zzAn0YfcApr8Q/edit) (now the [Monitoring