[Source compatibility suite] swift-futures failing to build - error: no such module 'Darwin.POSIX.signal'

[justice-adams-apple]

Description

swift-futures is failing to build with the following error:

swift-futures/Sources/Futures/Internal/Private.swift:9:8: error: no such module 'Darwin.POSIX.signal'
  7 | 
  8 | #if canImport(Darwin)
  9 | import Darwin.POSIX.signal
    |        `- error: no such module 'Darwin.POSIX.signal'
 10 | #else
 11 | import Glibc

Reproduction

swift build --disable-sandbox --package-path swift-futures --verbose --configuration debug --build-tests -Xswiftc -swift-version -Xswiftc 5 -Xswiftc -enable-testing

Expected behavior

expected the project build to pass

Environment

Apple Swift version 6.2-dev (LLVM 3a02857b159678d, Swift c91e295)
Target: x86_64-apple-macosx13.0

Additional information

https://ci.swift.org/job/swift-main-source-compat-suite-debug/1050/