modules/cluster: install wander from nixos-unstable

flake.nix

@@ -131,7 +131,9 @@
           then hostConf.ip4
           else throw "Host ${name} has no ip4 or ip6 address";
     in {
-      overlay = import ./overlay;
+      overlay = import ./overlay {
+        inherit nixos-unstable;
+      };
 
       legacyPackages = lib.attrsets.mapAttrs
         (system: pkgs: pkgs.appendOverlays

modules/cluster/default.nix

@@ -82,6 +82,6 @@ in {
 
   environment.systemPackages = with pkgs; [
     # nomad frontends
-    damon
+    damon wander
   ];
 }

overlay/default.nix

@@ -1,5 +1,11 @@
+{ nixos-unstable }:
+
 final: prev:
 
+let
+  pkgs-unstable = nixos-unstable.legacyPackages.${prev.system};
+
+in
 {
   bmxd = prev.callPackage ./bmxd.nix { };
 
@@ -50,4 +56,10 @@ final: prev:
   readsb = prev.callPackage ./readsb.nix { };
 
   SimpleYggGen-CPP = prev.callPackage ./simpleygggen.nix { };
+
+  wander =
+    if prev ? wander
+    then builtins.trace "`wander` is now available on stable NixOS. Please remove from overlay!"
+      prev.wander
+    else pkgs-unstable.wander;
 }