python3 C extension compilation failed

dh_install
set -e && for pyvers in 3.7; do \
        cd python && python$pyvers setup.py install --install-layout=deb \
                --root /<<PKGBUILDDIR>>/debian/python3-openvswitch; cd ..; \
done

running build_ext
building 'ovs._json' extension
creating build/temp.linux-x86_64-3.7
creating build/temp.linux-x86_64-3.7/ovs
x86_64-linux-gnu-gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.7m -c ovs/_json.c -o build/temp.linux-x86_64-3.7/ovs/_json.o
ovs/_json.c:2:10: fatal error: openvswitch/json.h: No such file or directory
    2 | #include <openvswitch/json.h>
      |          ^~~~~~~~~~~~~~~~~~~~
compilation terminated.
***************************************************************************
WARNING: The C extension could not be compiled, speedups are not enabled.
Failure information, if any, is above.
Retrying the build without the C extension.
***************************************************************************