failure during oxygen installation
checking for bison... not found!
make: * No targets specified and no makefile found. Stop.
make: * No rule to make target `install`. Stop.
INFO: The package should be locally build ...
so the installation fails, but the build process continues.
I noted this on the Maos 2.8.3 release, but checking back it was
there in the Maos 2.5.0 release