nixos/munin: require DejaVu fonts if enabled

munin-graph is hardcoded to use DejaVu Mono for the graph legends; if it
can't find it, there's no guarantee it finds a monospaced font at all,
and if it can't find a monospaced font the legends come out badly
misformatted.

1 files changed, 4 insertions, 0 deletions

diff --git a/nixos/modules/services/monitoring/munin.nix b/nixos/modules/services/monitoring/munin.nix
index dcdad6fac1ba..431d03975460 100644
--- a/nixos/modules/services/monitoring/munin.nix
+++ b/nixos/modules/services/monitoring/munin.nix
@@ -223,6 +223,10 @@ in
 
   }) (mkIf cronCfg.enable {
 
+    # Munin is hardcoded to use DejaVu Mono and the graphs come out wrong if
+    # it's not available.
+    fonts.fonts = [ pkgs.dejavu_fonts ];
+
     systemd.timers.munin-cron = {
       description = "batch Munin master programs";
       wantedBy = [ "timers.target" ];