Compiling Todo.elm fails on Windows: Debug.Watch not found

[chribben]

$ elm --make --only-js Todo.elm [1 of 6] Compiling Html ( elm_dependencies\evancz-elm-html\0.2\Html.elm ) [2 of 6] Compiling Html.Attributes ( elm_dependencies\evancz-elm-html\0.2\Html/Attributes.elm ) [3 of 6] Compiling Html.Events ( elm_dependencies\evancz-elm-html\0.2\Html/Events.elm ) [4 of 6] Compiling Html.Optimize.RefEq ( elm_dependencies\evancz-elm-html\0.2\Html/Optimize/RefEq.elm ) [5 of 6] Compiling Html.Tags ( elm_dependencies\evancz-elm-html\0.2\Html/Tags.elm ) [6 of 6] Compiling Todo ( Todo.elm ) Error on line 51, column 21 to 32: Could not find variable 'Debug.watch'.