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2026.9.25.1: workspace members compile the same way in every position… #1869

Job	Run time
windows→linux cross-build (windows host)	9m 57s
mingw-cross linux→windows (build + wine run)	8m 6s
cross-build aarch64-linux-musl (mcpp + xlings)	14m 19s
windows→linux artefact really runs (linux)	5s
	32m 27s