Last 15 lines from /Users/cesargdm/Library/Logs/Homebrew/bison/02.make: /Library/Developer/CommandLineTools/usr/bin/ranlib: file: lib/libbison.a(libbison_a-u8-uctomb.o) has no symbols /Library/Developer/CommandLineTools/usr/bin/ranlib: file: lib/libbison.a(libbison_a-wctype-h.o) has no symbols /Library/Developer/CommandLineTools/usr/bin/ranlib: file: lib/libbison.a(libbison_a-gl_xlist.o) has no symbols /Library/Developer/CommandLineTools/usr/bin/ranlib: file: lib/libbison.a(libbison_a-xsize.o) has no symbols CCLD src/bison Undefined symbols for architecture x86_64: "_ostream_printf", referenced from: _complains in bison-complain.o "_styled_ostream_set_hyperlink", referenced from: _complains in bison-complain.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [src/bison] Error 1 make[1]: *** [install-recursive] Error 1 make: *** [install] Error 2 Do not report this issue to Homebrew/brew or Homebrew/core! Error: You are using macOS 11.0. We do not provide support for this pre-release version. You will encounter build failures with some formulae. Please create pull requests instead of asking for help on Homebrew's GitHub, Discourse, Twitter or IRC. You are responsible for resolving any issues you experience while you are running this pre-release version.