fix: make module work and add instructions for using

README.md

@@ -12,6 +12,8 @@ inputs.actualbudget-report.url = "git+https://git.wanderingcrow.net/TheWandering
 
 Then in your configuration (using sops-nix, you will need to adjust it if you use agenix or alternatives):
 ```nix
+nixpkgs.overlays = [ inputs.actualbudget-report.overlays.default ];
+
 imports = [
     inputs.actualbudget-report.nixosModules.default;
 ];

flake.nix

@@ -7,17 +7,24 @@
   };
 
   outputs =
-    inputs@{ flake-parts, ... }:
-    flake-parts.lib.mkFlake { inherit inputs; } {
+    inputs@{
+      self,
+      flake-parts,
+      ...
+    }:
+    flake-parts.lib.mkFlake
+      {
+        inherit inputs;
+      }
+      {
+        imports = [ inputs.flake-parts.flakeModules.easyOverlay ];
         systems = [
           "x86_64-linux"
           "aarch64-linux"
           "aarch64-darwin"
           "x86_64-darwin"
         ];
-      flake.nixosModules = {
-        default = ./modules/actualbudget-report;
-      };
+        flake.nixosModules.default = ./modules/actualbudget-report;
         perSystem =
           {
             config,
@@ -28,7 +35,8 @@
             ...
           }:
           {
-          packages.default = pkgs.buildGoModule {
+            overlayAttrs = { inherit (config.packages) actualbudget-report; };
+            packages.actualbudget-report = pkgs.buildGoModule {
               name = "actualbudget-report";
               src = pkgs.fetchFromGitea {
                 domain = "git.wanderingcrow.net";

modules/actualbudget-report/default.nix

@@ -1,8 +1,8 @@
 {
+  pkgs,
   config,
   options,
   lib,
-  pkgs,
   ...
 }:
 let
@@ -10,8 +10,8 @@ let
   opt = options.services.actualbudget-report;
   inherit (lib)
     mkEnableOption
-    mkOption
     mkPackageOption
+    mkOption
     mkIf
     types
     ;
@@ -20,12 +20,12 @@ in
   options = {
     services.actualbudget-report = {
       enable = mkEnableOption "Actualbudget email reports";
-      package = mkPackageOption pkgs.default;
-      interval = {
+      interval = mkOption {
         type = types.str;
         default = "Sun 12:00:00";
         description = "systemd-timer OnCalendar legal string for sending reports.";
       };
+      package = mkPackageOption pkgs "actualbudget-report" { };
       environmentFile = mkOption {
         type = types.path;
         default = "";
@@ -39,11 +39,11 @@ in
       description = "Actualbudget report sender service";
       serviceConfig = {
         Type = "oneshot";
-        ExecStart = "${cfg.package}/bin/actualbudget-report";
+        ExecStart = "${pkgs.actualbudget-report}/bin/actualbudget-report";
         EnvironmentFile = cfg.environmentFile;
       };
     };
-    systemd.timers.flamesite-backup = {
+    systemd.timers.actualbudget-report = {
       enable = true;
       wantedBy = [ "timers.target" ];
       timerConfig = {