diff --git a/flatpak-management.nix b/flatpak-management.nix
index 41def20..a79c44e 100644
--- a/flatpak-management.nix
+++ b/flatpak-management.nix
@@ -29,7 +29,7 @@ let
     done
 
     # Hardcoded Threema install because the beta is not on Flathub yet
-    ${pkgs.flatpak}/bin/flatpak install -y --from https://releases.threema.ch/flatpak/threema-desktop/ch.threema.threema-desktop.flatpakref --noninteractive flathub "$app"
+    ${pkgs.flatpak}/bin/flatpak install -y --from https://releases.threema.ch/flatpak/threema-desktop/ch.threema.threema-desktop.flatpakref --noninteractive
 
     # Remove unused Flatpaks
     ${pkgs.flatpak}/bin/flatpak uninstall --unused -y --noninteractive