diff --git a/nixos/modules/services/misc/calibre-server.nix b/nixos/modules/services/misc/calibre-server.nix
index 10da80b8c498..df36c41d1e71 100644
--- a/nixos/modules/services/misc/calibre-server.nix
+++ b/nixos/modules/services/misc/calibre-server.nix
@@ -155,7 +155,7 @@ in
 
     };
 
-    environment.systemPackages = [ pkgs.calibre ];
+    environment.systemPackages = [ cfg.package ];
 
     users.users = lib.optionalAttrs (cfg.user == "calibre-server") {
       calibre-server = {