// so we don't write some go.mods with the "before" toolchain
		// and others with the "after" toolchain. If nothing else, that
		// discrepancy could show up in auto-recorded toolchain lines.
		changed, err := modload.EditBuildList(ctx, nil, mustSelectFor[m])
		if err != nil {
			continue
		}
		if changed {
			modload.LoadPackages(ctx, modload.PackageOpts{
				Tags:                     imports.AnyTags(),