when I do the make

[l2airj]

dragon@dragon:/usr/src/sdrpp-tetra-demodulator/build$ sudo make
Consolidate compiler generated dependencies of target tetra_demodulator
[ 2%] Building CXX object CMakeFiles/tetra_demodulator.dir/src/main.cpp.o
In file included from /usr/src/sdrpp-tetra-demodulator/src/main.cpp:27:
/usr/src/sdrpp-tetra-demodulator/src/dsp/osmotetra_dec.h:13:14: fatal error: c-code/channel.h: No such file or directory
13 | #include "c-code/channel.h"
| ^~~~~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/tetra_demodulator.dir/build.make:552: CMakeFiles/tetra_demodulator.dir/src/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/tetra_demodulator.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

[jj15warrior]

same issue, using endeabourOS - an arch derivative