stack not working on Mojave (macOS 10.14.6)

[macportsmojave]

Tried to build stack (haskell's build tool, haskellstack) on Mojave (macOS 10.14.6).

The command

port install stack

installs version 3.5.1

However, when I try to use stack,

stack build

stack first tries to install GHC (the Haskell compiler), and fails

---

$ stack build

Preparing to install GHC to an isolated location. This will not interfere with
any system-level installation.
Already downloaded ghc-9.8.4.      
Unpacking GHC into ~/.stack/programs/x86_64-osx/ghc-9.8.4.temp/ ...dyld: lazy symbol binding failed: Symbol not found: _posix_spawn_file_actions_addchdir_np
  Referenced from: /opt/local/bin/stack (which was built for Mac OS X 13.0)
  Expected in: /opt/local/lib/libMacportsLegacySystem.B.dylib

dyld: Symbol not found: _posix_spawn_file_actions_addchdir_np
  Referenced from: /opt/local/bin/stack (which was built for Mac OS X 13.0)
  Expected in: /opt/local/lib/libMacportsLegacySystem.B.dylib

Evidently, stack 3.5.1 is built for Ventura (macOS 13.0), though I am still on Mojave (10.14.6). Is there a workaround?