Fix win32 build. #12142

Job	Run time
build_js	1m 53s
build_opam (4.14.x)	5m 25s
build_details	7s
build_opam (5.3.x)	3m 36s
tree_sitter_parse	1m 6s
lezer_parse	45s
build_no_depopts	4m 31s
build_posix (debian_trixie, amd64)	11m 33s
run_tests (@citest)	10m 1s
build_win32 (x64)	10m 29s
build_posix (debian_trixie, arm64)	14m 50s
run_tests (@doctest)	5m 51s
build_posix (debian_bookworm, amd64)	10m 28s
run_tests (@mediatest)	9m 44s
update_doc	0s
build_posix (debian_bookworm, arm64)	13m 15s
build_posix (ubuntu_oracular, amd64)	10m 41s
build_posix (ubuntu_oracular, arm64)	14m 0s
build_posix (ubuntu_noble, amd64)	10m 59s
build_posix (ubuntu_noble, arm64)	14m 44s
build_posix (alpine, amd64)	7m 21s
build_posix (alpine, arm64)	9m 12s
fetch_s3_artifacts	32s
build_docker (amd64)	1m 39s
build_docker_minimal (amd64)	1m 43s
build_docker (arm64)	1m 52s
build_docker_minimal (arm64)	2m 4s
build_docker_alpine_minimal (amd64)	51s
build_docker_alpine (amd64)	1m 27s
build_docker_alpine_minimal (arm64)	55s
build_docker_alpine (arm64)	1m 13s
update_release	0s
build_docker_release	0s
build_docker_release-minimal	0s
	3h 2m 47s

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