!fixup

src/client/opamClient.ml

@@ -799,9 +799,11 @@ let git_for_windows kind mechanism cygwin_is_tweakable =
   in
   let options =
     (List.filter_map (fun (git, bash) ->
-        if bash then None else
-        let bin = Filename.dirname git in
-        Some (`Location bin, "Use found git in "^bin))
+        if bash then
+          None
+        else
+          let bin = Filename.dirname git in
+          Some (`Location bin, "Use found git in "^bin))
         gits)
     @ [
       `Specify, "Enter the location of your Git installation";
@@ -1079,7 +1081,7 @@ let rec cygwin_menu header =
       begin match cygcheck with
       | Some (Ok (kind2, root2)) ->
         let root2 = OpamFilename.Dir.to_string root2 in
-        if kind = kind2 && String.equal root root2 then
+        if (kind : [`Cygwin | `Msys2]) = kind2 && String.equal root root2 then
           let default, warning =
             if kind = `Msys2 && OpamSystem.resolve_command pacman = None then
               internal_option, Some (Printf.sprintf

src/state/opamSysPoll.ml

@@ -121,7 +121,7 @@ let poll_os_distribution () =
     begin match kind with
     | `Msys2 -> Some "msys2"
     | `Cygwin -> Some "cygwin"
-    | _ -> os
+    | `Native | `Tainted _ -> os
     end
   | os -> os
 let os_distribution = Lazy.from_fun poll_os_distribution