Attempt to fix wasm_of_ocaml (#1958) #714

Job	Run time
docker-master	1h 24m 26s
publish-standalone-dry-run	15s
test-standalone (master, dev, default)	1m 24s
build-js-of-ocaml (master, 4.11.1)	13m 1s
build-wasm-of-ocaml (master, 4.14.1)	2h 22m 48s
generated-files (master)	29s
standalone-haskell (master)	45m 43s
test-amd64	2h 17m 59s
validate-docker-master	20m 32s
deploy-js-wasm-of-ocaml	0s
docker-check-all	7s
	7h 26m 44s

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