diff --git a/examples/rotuer.nix b/examples/rotuer.nix
index 0ed1e5f5..c7c443fa 100644
--- a/examples/rotuer.nix
+++ b/examples/rotuer.nix
@@ -87,7 +87,7 @@ in rec {
   services.bridge =  svc.bridge.members.build {
     primary = services.int;
     members = with config.hardware.networkInterfaces;
-      [ wlan_24 wlan_5  lan ];
+      [ wlan_24 wlan_5 lan ];
   };
 
   services.ntp = svc.ntp.build {
diff --git a/modules/flashimage.nix b/modules/flashimage.nix
index 686d46c1..73dc1fec 100644
--- a/modules/flashimage.nix
+++ b/modules/flashimage.nix
@@ -54,6 +54,7 @@ in {
         '';
       flashimage =
         let o = config.system.outputs; in
+        # could use trivial-builders.linkFarmFromDrvs here?
         pkgs.runCommand "flashimage" {} ''
           mkdir $out
           cd $out
diff --git a/modules/outputs.nix b/modules/outputs.nix
index 810241b7..b0edf171 100644
--- a/modules/outputs.nix
+++ b/modules/outputs.nix
@@ -75,6 +75,7 @@ in
         inherit kernel;
         inherit dtb;
       };
+      # could use trivial-builders.linkFarmFromDrvs here?
       vmroot = pkgs.runCommand "qemu" {} ''
         mkdir $out
         cd $out