Openzwave install fails, libopenzwave.a not found

I’ve been following the zwave install on HA site.
First i cloned the repo under the pi user’s home directory. That didn’t work, so i cloned it under the homeassistant directory. on the make build it stops with this:

creating build/lib.linux-armv7l-3.4
arm-linux-gnueabihf-g++ -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.4/src-lib/libopenzwave/libopenzwave.o openzwave/libopenzwave.a -ludev -lstdc++ -o build/lib.linux-armv7l-3.4/
arm-linux-gnueabihf-g++: error: openzwave/libopenzwave.a: No such file or directory
error: command 'arm-linux-gnueabihf-g++' failed with exit status 1
Makefile:266: recipe for target 'build' failed

Same problem here, what to look for ?