Rename flake packages

flake.nix

@@ -17,22 +17,22 @@
 
       systems = import systems;
 
-      perSystem = { pkgs, system, ... }: {
+      perSystem = { config, pkgs, system, ... }: {
         _module.args.pkgs = import nixpkgs {
           inherit system;
           overlays = [ gomod2nix.overlays.default ];
         };
 
-        packages.default = pkgs.buildGoApplication {
+        overlayAttrs = {
+          iecs = config.packages.iecs;
+        };
+
+        packages.iecs = pkgs.buildGoApplication {
           pname = "iecs";
           version = "0.1.0";
           src = ./.;
           modules = ./gomod2nix.toml;
         };
-
-        overlayAttrs = {
-          iecs = pkgs.hello; # config.packages.default;
-        };
       };
     };
 }