diff --git a/rust/default.nix b/rust/default.nix
index 2700ac8..8cb5233 100644
--- a/rust/default.nix
+++ b/rust/default.nix
@@ -154,6 +154,8 @@
 
             nix = lib.mkEnableOption "formatting for nix files" // {default = true;};
             rust = lib.mkEnableOption "formatting for rust files" // {default = true;};
+            toml = lib.mkEnableOption "formatting for toml files" // {default = true;};
+            markdown = lib.mkEnableOption "formatting for toml files" // {default = true;};
           };
 
           checks = {
@@ -203,6 +205,9 @@
               enable = true;
               edition = manifest.edition;
             };
+            taplo.enable = lib.mkIf cfg.formatter.toml true;
+            rumdl-check.enable = lib.mkIf cfg.formatter.markdown true;
+            rumdl-format.enable = lib.mkIf cfg.formatter.markdown true;
           };
 
           checks = lib.mkIf cfg.checks.enable {