$ bitbake  -b /opt/OE/org.openembedded.dev/packages/nano/nano_1.2.1.bb 
NOTE: package nano-1.2.1: started
NOTE: package nano-1.2.1-r0: task do_populate_staging: started
NOTE: exceptions.TypeError:unsupported operand type(s) for +: 'NoneType' and 'str' while evaluating:
${@siteinfo_get_endianess(d)}
NOTE: exceptions.TypeError:unsupported operand type(s) for +: 'NoneType' and 'str' while evaluating:
${@siteinfo_get_files(d)}
NOTE: exceptions.TypeError:unsupported operand type(s) for +: 'NoneType' and 'str' while evaluating:
${@siteinfo_get_bits(d)}
NOTE: package nano-1.2.1-r0: task do_populate_staging: completed
NOTE: package nano-1.2.1-r0: task do_build: started
NOTE: package nano-1.2.1-r0: task do_build: completed
NOTE: package nano-1.2.1: completed