fix merge conflict #982

Job	Run time
install (dev, Ubuntu, ubuntu-latest, 4.09.1)	39m 0s
install (dev, macOS, macos-latest, 4.14.2)	36m 46s
install (dev, Windows, windows-latest, 4.13.1, -async-proofs-j 1, git+https://github.com/ocaml/oc...	1h 31m 51s
install (8.20.0, Ubuntu, ubuntu-latest, 4.09.1)	39m 56s
install (8.20.0, macOS, macos-latest, 4.14.2)	36m 14s
install (8.20.0, Windows, windows-latest, 4.13.1, -async-proofs-j 1, git+https://github.com/ocaml...	1h 33m 35s
install (8.19.0, Ubuntu, ubuntu-latest, 4.09.1)	41m 41s
install (8.19.0, macOS, macos-latest, 4.14.2)	38m 7s
install (8.19.0, Windows, windows-latest, 4.13.1, -async-proofs-j 1, git+https://github.com/ocaml...	1h 35m 55s
install (8.18.0, Ubuntu, ubuntu-latest, 4.09.1)	41m 49s
install (8.18.0, macOS, macos-latest, 4.14.2)	39m 26s
install (8.18.0, Windows, windows-latest, 4.13.1, -async-proofs-j 1, git+https://github.com/ocaml...	1h 40m 2s
	11h 34m 22s

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