[codex] Restore Windows --dev source selection #951

Job	Run time
build-darwin (amd64)	1m 22s
build-darwin (arm64)	32s
build (windows, 386)	1m 45s
build (freebsd, 386)	58s
build (linux, amd64)	1m 25s
build (openbsd, 386)	52s
build (openbsd, amd64)	57s
build (windows, amd64)	48s
build (freebsd, amd64)	55s
build (linux, loong64)	1m 30s
build (linux, mipsle, softfloat)	54s
build (linux, arm, 5)	51s
build (dragonfly, amd64)	48s
build (linux, 386)	1m 30s
build (openbsd, arm, 7)	59s
build (linux, mipsle)	57s
build (linux, arm64)	1m 41s
build (linux, arm, 7)	2m 3s
build (linux, riscv64)	46s
build (linux, ppc64)	55s
build (linux, ppc64le)	50s
build (android, arm64)	1m 27s
build (windows, arm64)	1m 0s
build (freebsd, arm64)	55s
build (openbsd, arm64)	53s
build (linux, mips)	48s
build (linux, arm, 6)	19s
build (linux, mips64le)	51s
build (linux, mips, softfloat)	52s
build (freebsd, arm, 7)	53s
build (linux, s390x)	55s
build (linux, mips64)	53s
darwin-universal	14s
release	0s
publish-new-formula	0s
	33m 18s

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