"ESP_DHCP_DEBUG" is undeclared", problem building with docker container esp-idf 4.1.3

[Melbourne]

Using "docker pull espressif/idf:v4.1.3", when I try to build I get a series of errors "ESP_DHCP_DEBUG" is undeclared

for example:

/opt/esp/idf/components/lwip/lwip/src/core/ipv4/dhcp.c:292:15: error: 'ESP_DHCP_DEBUG' undeclared (first use in this function); did you mean 'DHCP_DEBUG'?

Have I done something wrong? Is there a discussion somewhere that I can/should read?