aeffectx.h: No such file or directory at compile time

[klikklakBEN]

Linux Mint 21.3 building from source by INSTALL.md the step of compilation:

mvn -e clean verify -P native-modules

is producing an error trying to compile files for vst:

compile-native:
     [exec] rm -f VSTClient.o VST.o VSTLogger.o VSTPlugin.o VSTPluginLoader_GNULinux.o VSTSocket_GNULinux.o VSTEffect.o VSTEffectUI_GNULinux.o  tuxguitar-synth-vst.bin
     [exec] g++ -I/media/kupnu4/DATA/source_files/sources/tuxguitar/desktop/build-scripts/native-modules/tuxguitar-synth-vst-linux-x86_64/inIn file included from VSTClient.h:4,
     [exec]                  from VSTClient.c:7:
     [exec] VST.h:4:10: fatal error: aeffectx.h: No such file or directory
     [exec]     4 | #include <aeffectx.h>
     [exec]       |          ^~~~~~~~~~~~
     [exec] compilation terminated.
     [exec] make: *** [GNUmakefile:43: VSTClient.o] Error 1
     [exec] clude -fPIC -fpermissive -c -o VSTClient.o VSTClient.c

[INFO] tuxguitar-synth-vst-linux-x86_64 9.99-SNAPSHOT ..... FAILURE [  1.395 s]

i guess it's one of the libraries for the VST2_SDK by Steinberg that is no longer provided by them since they're deprecated.