europa: disable autoupdate, move DIRTY comment to proper location

flake.nix

@@ -115,9 +115,6 @@
         inputs.talon.overlays.default
       ];
 
-      # Set our configurationRevison based on the status of our git repo.
-      # If the repo is dirty, disable autoUpgrade as it means we are
-      # testing something.
       buildSys = sys: sysBase: extraMods: name:
         sysBase.lib.nixosSystem {
           system = sys;

hosts/europa/default.nix

@@ -321,5 +321,6 @@ in {
   ];
 
   system.autoUpgrade.allowReboot = false;
+  system.autoUpgrade.enable = false;
   system.stateVersion = "21.11";
 }

lib/default.nix

@@ -42,6 +42,9 @@ let
       ];
     };
 
+  # Set our configurationRevison based on the status of our git repo.
+  # If the repo is dirty, disable autoUpgrade as it means we are
+  # testing something.
   buildVer = self:
     let state = self.rev or "DIRTY";
     in {