regression on -current with pulseaudio

pulseaudio doesn't build anymore on Slackware64-current:
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[426/565] Compiling C object src/modules/module-echo-cancel.so.p/echo-cancel_adrian-aec.c.o
FAILED: src/modules/module-echo-cancel.so.p/echo-cancel_adrian-aec.c.o
ccache cc -Isrc/modules/module-echo-cancel.so.p -I. -I.. -Isrc -I../src -I/usr/include/orc-0.4 -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu11 -O3 -O2 -fPIC -fPIC -pthread -DHAVE_CONFIG_H -D_GNU_SOURCE -D__INCLUDED_FROM_PULSE_AUDIO -DPA_MODULE_NAME=module_echo_cancel -DHAVE_ADRIAN_EC=1 -MD -MQ src/modules/module-echo-cancel.so.p/echo-cancel_adrian-aec.c.o -MF src/modules/module-echo-cancel.so.p/echo-cancel_adrian-aec.c.o.d -o src/modules/module-echo-cancel.so.p/echo-cancel_adrian-aec.c.o -c ../src/modules/echo-cancel/adrian-aec.c
../src/modules/echo-cancel/adrian-aec.c:30:10: fatal error: adrian-aec-orc-gen.h: No such file or directory
30 | #include "adrian-aec-orc-gen.h"
| ^~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
[434/565] Compiling C object src/modules/module-echo-cancel.so.p/echo-cancel_module-echo-cancel.c.o
ninja: build stopped: subcommand failed.
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