unikernel/duniverse/dune_/doc/reference/config/cache.rst

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+cache
+-----
+
+Specifies whether Dune is allowed to store and fetch build targets from the Dune
+cache.
+
+.. code:: dune
+
+    (cache <setting>)
+
+where ``<setting>`` is one of:
+
+- ``enabled`` enables Dune cache.
+
+- ``enabled-except-user-rules`` enables the Dune cache, but exclude user-written
+  rules. This setting is a conservative choice that can avoid breaking rules
+  whose dependencies are not correctly specified. Currently the default.
+
+- ``disabled`` disables Dune cache.