This might be an easily answerable question, but it's really got me stumped. I'm redownloading pyindi-client following www.indilib.org/develop/indi-python-bindings.html . At
--> pip3 install --user --install-option="--prefix=" pyindi-client

I get an error:
arm-linux-genueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include -I/usr/include/libindi -I/usr/include/python3.5m -c indiclientpython_wrap.cpp -o build/temp.linux-armv7l-3.5/indiclientpython_wrap.o -std=c++11
cc1plus: warning: command line option '-Wstrict-prototypes' is valid for C/ObjC but not for C++
creating build/lib.linux-armv7l-3.5
arm-linux-gnueabihf-g++ -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-s,relro -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.5/indiclientpython_wrap.o /usr/lib/libindiclient.a -lz -lcfitsio -lnova -o build/lib.linux-armv7l-3.5/_PyIndi.cpython-35m-arm-linux-gnueabihf.so
/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
error: command 'arm-linux-gnueabihf-g++' failed with exit status 1

I'm not sure what's going on, because last time I went through the process it went without a hitch.

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