Convert ANTLR4 grammar to the Fuzzingbook JSON format
You will need atleast these invocations to make make work
curl -O https://www.antlr.org/download/antlr-4.7.2-complete.jar
mv antlr-4.7.2-complete.jar ..
pip install antlr4-python3-runtime==4.7.2
Next try make
make