diff --git a/nixos/modules/services/web-apps/grocy.nix b/nixos/modules/services/web-apps/grocy.nix
index 3bcda3caedac..688367cafaf5 100644
--- a/nixos/modules/services/web-apps/grocy.nix
+++ b/nixos/modules/services/web-apps/grocy.nix
@@ -117,7 +117,9 @@ in {
 
       # PHP 8.0 is the only version which is supported/tested by upstream:
       # https://github.com/grocy/grocy/blob/v3.3.0/README.md#how-to-install
-      phpPackage = pkgs.php80;
+      # Compatibility with PHP 8.1 is available on their development branch:
+      # https://github.com/grocy/grocy/commit/38a4ad8ec480c29a1bff057b3482fd103b036848
+      phpPackage = pkgs.php81;
 
       inherit (cfg.phpfpm) settings;
 
diff --git a/pkgs/servers/grocy/default.nix b/pkgs/servers/grocy/default.nix
index 360f5202e28a..bbae0f8f248f 100644
--- a/pkgs/servers/grocy/default.nix
+++ b/pkgs/servers/grocy/default.nix
@@ -36,5 +36,6 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ ma27 ];
     description = "ERP beyond your fridge - grocy is a web-based self-hosted groceries & household management solution for your home";
     homepage = "https://grocy.info/";
+    broken = true; # Not compatible with PHP 8.1
   };
 }