dune fmt in Developer Preview fails with No such file or directory

[tmattio]

Running dune fmt with Dune developer preview fails with:

Error:                                
_build/.sandbox/d4a4caf6db483a754fb4b2fbf3348daf/_private/default/.dev-tool/ocamlformat/ocamlfind/source/0001-Harden-test-for-OCaml-5.patch:
No such file or directory
-> required by
   _build/_private/default/.dev-tool/ocamlformat/ocamlfind/target/cookie
-> required by - package base-bytes
-> required by - package ocp-indent
-> required by - package ocamlformat-lib
-> required by - package ocamlformat
-> required by _build/default/test/.formatted/test_spin.ml
-> required by alias test/.formatted/fmt
-> required by alias test/fmt

I'm using

dune --version
"Dune Developer Preview: build , git revision
17071ec30d10390badcb6cb1f6a43984b1be54a6"

[tmattio]

Duplicate of #10903, fixed by #10951