How to build the 5.7.1 toolchain in swift.org release-like archive layout on Ubuntu 20.04 or 22.04

Ah, there was another toolchain-benchmarks some lines below in the same preset, so of course the skip-toolchain-benchmarks somewhere above wouldn't have effect. Patched that away, trying again now… (that does work, now going to try to make lintian happy, too)

@mishal_shah any thoughts on why that failure is happening when building the Focal deb? I continue to see an equivalent failure both when attempting to build (with docker-compose, as advised in the README) either 5.7.1. or 5.7.2 if I don't patch away the toolchain-benchmarks:

--- Building benchmarks ---
Traceback (most recent call last):
  File "swift/utils/build-script", line 720, in <module>
    sys.exit(main())
  File "swift/utils/build-script", line 715, in main
    return main_normal()
  File "swift/utils/build-script", line 671, in main_normal
    invocation.execute()
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/build_script_invocation.py", line 672, in execute
    self._execute(pipeline, [self.args.host_target] +
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/build_script_invocation.py", line 735, in _execute
    self.execute_product_build_steps(product_class, host_target)
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/build_script_invocation.py", line 791, in execute_product_build_steps
    product.build(host_target)
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/products/benchmarks.py", line 49, in build
    run_build_script_helper(host_target, self, self.args)
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/products/benchmarks.py", line 123, in run_build_script_helper
    toolchain_path = _get_toolchain_path(host_target, product, args)
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/products/benchmarks.py", line 107, in _get_toolchain_path
    if swiftpm.SwiftPM.has_cross_compile_hosts(args):
  File "/tmp/swift-deb-builder/swiftlang-5.7.2/swift/utils/swift_build_support/swift_build_support/products/product.py", line 248, in has_cross_compile_hosts
    return self.args.cross_compile_hosts
AttributeError: 'Namespace' object has no attribute 'args'
ERROR: command terminated with a non-zero exit status 1, aborting