diff --git a/modules/home-manager/profiles/desktop.nix b/modules/home-manager/profiles/desktop.nix
index 5797bcee..1e01ea2a 100644
--- a/modules/home-manager/profiles/desktop.nix
+++ b/modules/home-manager/profiles/desktop.nix
@@ -26,7 +26,7 @@ in {
         ffmpeg-full # Ah yes, everyman's multimedia swiss army knife.
         imagemagick # Ah yes, everyman's image manipulation tool.
         gmic # Don't let the gimmicks fool you, it's a magical image framework.
-      ] ++ (lib.optional (osConfig ? programs.blender.enable && !osConfig.programs.blender.enable) blender);
+      ] ++ (lib.optional (osConfig ? programs.blender.enable -> !osConfig.programs.blender.enable) blender);
     })
 
     (lib.mkIf cfg.audio.enable {
diff --git a/users/home-manager/foo-dogsquared/modules/browser.nix b/users/home-manager/foo-dogsquared/modules/browser.nix
index 93f78adf..91245c0e 100644
--- a/users/home-manager/foo-dogsquared/modules/browser.nix
+++ b/users/home-manager/foo-dogsquared/modules/browser.nix
@@ -33,7 +33,7 @@
   };
 
   # Despite the name, it isn't a browser for furries.
-  programs.firefox = lib.mkIf (osConfig ? programs.firefox.enable && !osConfig.programs.firefox.enable) {
+  programs.firefox = lib.mkIf (osConfig ? programs.firefox.enable -> !osConfig.programs.firefox.enable) {
     enable = true;
 
     package = with pkgs; wrapFirefox firefox-unwrapped {