they weren't cross-platform. fixed

modules/apps/chrome.nix

@@ -1,10 +1,14 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, options, ... }:
 with lib;
 {
-  home-manager.users.vitalya.programs.chromium = mkIf (!pkgs.stdenv.isDarwin) {
-    enable = true;
-    package = pkgs.google-chrome;
-  };
-
-  homebrew.casks = mkIf pkgs.stdenv.isDarwin [ "google-chrome" ];
+  config = mkMerge [
+    (if (builtins.hasAttr "homebrew" options) then {
+      homebrew.casks = [ "google-chrome" ];
+    } else {
+      home-manager.users.vitalya.programs.chromium = {
+        enable = true;
+        package = pkgs.google-chrome;
+      };
+    })
+  ];
 }

modules/apps/firefox.nix

@@ -1,10 +1,14 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, options, ... }:
 with lib;
 {
-  home-manager.users.vitalya.programs.firefox = mkIf (!pkgs.stdenv.isDarwin) {
-    enable = true;
-    package = pkgs.firefox;
-  };
-
-  homebrew.casks = mkIf pkgs.stdenv.isDarwin [ "firefox" ];
+  config = mkMerge [
+    (if (builtins.hasAttr "homebrew" options) then {
+      homebrew.casks = [ "firefox" ];
+    } else {
+      home-manager.users.vitalya.programs.firefox = {
+        enable = true;
+        package = pkgs.firefox;
+      };
+    })
+  ];
 }

modules/apps/messaging.nix

@@ -1,17 +1,19 @@
-{ pkgs, lib, ... }:
-
+{ pkgs, lib, options, ... }:
 with lib;
 {
-  home-manager.users.vitalya.home.packages = mkIf (!pkgs.stdenv.isDarwin)
-    (with pkgs; [
-      (discord.override {
-        withOpenASAR = true;
-      })
-      tdesktop
-    ]);
-
-  homebrew.casks = mkIf pkgs.stdenv.isDarwin [
-    "discord"
-    "telegram"
+  config = mkMerge [
+    (if (builtins.hasAttr "homebrew" options) then {
+      homebrew.casks = [
+        "discord"
+        "telegram"
+      ];
+    } else {
+      home-manager.users.vitalya.home.packages = with pkgs; [
+        (discord.override {
+          withOpenASAR = true;
+        })
+        tdesktop
+      ];
+    })
   ];
 }

modules/apps/minecraft.nix

@@ -1,8 +1,11 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, options, ... }:
 with lib;
 {
-  home-manager.users.vitalya.home.packages = mkIf (!pkgs.stdenv.isDarwin)
-    (with pkgs; [ prismlauncher ]);
-
-  homebrew.casks = mkIf pkgs.stdenv.isDarwin [ "prismlauncher" ];
+  config = mkMerge [
+    (if (builtins.hasAttr "homebrew" options) then {
+      homebrew.casks = [ "prismlauncher" ];
+    } else {
+      home-manager.users.vitalya.home.packages = with pkgs; [ prismlauncher ];
+    })
+  ];
 }

modules/apps/streaming.nix

@@ -1,8 +1,11 @@
-{ pkgs, lib, ... }:
+{ pkgs, lib, options, ... }:
 with lib;
 {
-  home-manager.users.vitalya.home.packages = mkIf (!pkgs.stdenv.isDarwin)
-    (with pkgs; [ obs-studio ]);
-
-  homebrew.casks = mkIf pkgs.stdenv.isDarwin [ "obs" ];
+  config = mkMerge [
+    (if (builtins.hasAttr "homebrew" options) then {
+      homebrew.casks = [ "obs" ];
+    } else {
+      home-manager.users.vitalya.home.packages = with pkgs; [ obs-studio ];
+    })
+  ];
 }

modules/apps/vlc.nix

@@ -1,9 +1,11 @@
-{ pkgs, lib, ... }:
-
+{ pkgs, lib, options, ... }:
 with lib;
 {
-  home-manager.users.vitalya.home.packages = mkIf (!pkgs.stdenv.isDarwin)
-    (with pkgs; [ vlc ]);
-
-  homebrew.casks = mkIf pkgs.stdenv.isDarwin [ "vlc" ];
+  config = mkMerge [
+    (if (builtins.hasAttr "homebrew" options) then {
+      homebrew.casks = [ "vlc" ];
+    } else {
+      home-manager.users.vitalya.home.packages = with pkgs; [ vlc ];
+    })
+  ];
 }