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+# readthedocs.org gives no way to change the install command to "pip
+# install -e .[dev]" (that would in turn install documentation
+# dependencies), but it allows to specify a requirements.txt file at
+# https://readthedocs.org/dashboard/letsencrypt/advanced/ (c.f. #259)
+
+# Although ReadTheDocs certainly doesn't need to install the project
+# in --editable mode (-e), just "pip install .[dev]" does not work as
+# expected and "pip install -e .[dev]" must be used instead
+
+-e .[dev]