@@ -17,7 +17,8 @@ exceptions, and verified resource management.
1717This tutorial assumes familiarity with pure programming in Idris,
1818as described in Sections 1–6 of the main tutorial [1]_. The examples
1919presented are tested with Idris and can be found in the
20−examples directory of the Idris repository.
20+examples directory of the Idris repository. The ``-p effects`` flag
21+is needed when starting Idris.
2122
2223Consider, for example, the following introductory function which
2324illustrates the kind of properties which can be expressed in the type