ponyc: x86 Mac OS Sonoma Compile Error with XCode 15 and

Upgraded from Ventura to Sonoma. Now getting the following error trying to compile code that used to work:

ponyc -d -b play
Building builtin -> /usr/local/Cellar/ponyc/0.56.2/packages/builtin
Building . -> /Users/kieran/Work/gol_implementations/pony
Building collections -> /usr/local/Cellar/ponyc/0.56.2/packages/collections
Building pony_test -> /usr/local/Cellar/ponyc/0.56.2/packages/pony_test
Building time -> /usr/local/Cellar/ponyc/0.56.2/packages/time
Building random -> /usr/local/Cellar/ponyc/0.56.2/packages/random
Building itertools -> /usr/local/Cellar/ponyc/0.56.2/packages/itertools
Building format -> /usr/local/Cellar/ponyc/0.56.2/packages/format
Generating
 Reachability
 Selector painting
 Data prototypes
 Data types
 Function prototypes
 Functions
 Descriptors
Writing ./play.o
Linking ./play
ld: Missing -platform_version option
Error:
unable to link: ld -execute -arch x86_64 -o ./play ./play.o -L"/usr/local/Cellar/ponyc/0.56.2/bin/" -L"/usr/local/Cellar/ponyc/0.56.2/bin/../lib/native" -L"/usr/local/Cellar/ponyc/0.56.2/bin/../packages" -L"/usr/local/lib"  -lponyrt -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib -lSystem