tests: remove package dependencies on rofi and abook

tests/modules/programs/abook/no-settings.nix

@@ -6,6 +6,9 @@ with lib;
   config = {
     programs.abook.enable = true;
 
+    nixpkgs.overlays =
+      [ (self: super: { abook = pkgs.writeScriptBin "dummy-abook" ""; }) ];
+
     nmt.script = ''
       assertPathNotExists home-files/.config/abook/abookrc
     '';

tests/modules/programs/abook/with-settings.nix

@@ -28,6 +28,9 @@ with lib;
       '';
     };
 
+    nixpkgs.overlays =
+      [ (self: super: { abook = pkgs.writeScriptBin "dummy-abook" ""; }) ];
+
     nmt.script = ''
       assertFileExists home-files/.config/abook/abookrc
       assertFileContent home-files/.config/abook/abookrc ${./with-settings.cfg}

tests/modules/programs/rofi/assert-on-both-theme-and-colors.nix

@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 
 with lib;
 
@@ -20,6 +20,9 @@ with lib;
     home.file.result.text = builtins.toJSON
       (map (a: a.message) (filter (a: !a.assertion) config.assertions));
 
+    nixpkgs.overlays =
+      [ (self: super: { rofi = pkgs.writeScriptBin "dummy-rofi" ""; }) ];
+
     nmt.script = ''
       assertFileContent \
         home-files/result \