diff --git a/modules/services/databases/postgresql.nix b/modules/services/databases/postgresql.nix
index 1633b9d0fdd..398fdbd8611 100644
--- a/modules/services/databases/postgresql.nix
+++ b/modules/services/databases/postgresql.nix
@@ -20,7 +20,7 @@ let
         '';
     };
 
-  postgresql = postgresqlAndPlugins pkgs.postgresql;
+  postgresql = postgresqlAndPlugins cfg.package;
 
   run = "su -s ${pkgs.stdenv.shell} postgres";
 
@@ -54,6 +54,13 @@ in
         '';
       };
 
+      package = mkOption {
+        default = pkgs.postgresql;
+        description = ''
+          PostgreSQL package to use.
+        '';
+      };
+
       port = mkOption {
         default = "5432";
         description = ''