tracing-instrumentation-lttng doesn't build: 'core/or/lttng_circuit.inc' file not found

In file included from src/core/or/circuitlist.c:68:
./src/core/or/trace_probes_circuit.h:18:10: fatal error: 'core/or/lttng_circuit.inc' file not found
#include "core/or/lttng_circuit.inc"

0.4.5.1-alpha on FreeBSD 12.2

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