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2026.9.8.1: a package's host modules are ordered by what they import, and the design document aligned with what shipped #1761

Job	Run time
build + unit tests (linux x86_64, self-host)	7m 43s
toolchain: gcc (cold self-host)	7m 31s
toolchain: musl + llvm	7m 39s
integration: mcpp builds & runs xlings	7m 44s
examples: the curriculum builds	7m 30s
	38m 7s