error building on Ubuntu 20.04

[tbswork1]

Project docs says it is built on Ubuntu 20.04 but I have the following issue building unix port:

in file included from ../../lib/axtls/ssl/tls1.h:46, from ../../lib/axtls/ssl/ssl.h:75, from ../../extmod/modussl_axtls.c:44: ../../lib/axtls/ssl/os_port.h:1:20: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token 1 | os_port_micropython.h | ^