Caot find -lz | ld returned 1 exit status | command 'x86_64-linux-gnu-gcc' failed..

Code:

x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wl,-Bsymbolic-functions -Wl,-z,relro -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security build/temp.linux-x86_64-2.7/src/lxml/lxml.etree.o -lxslt -lexslt -lxml2 -lz -lm -o build/lib.linux-x86_64-2.7/lxml/etree.so


/usr/bin/ld: caot find -lz


collect2: error: ld retued 1 exit status

error: command 'x86_64-linux-gnu-gcc' failed with exit status 1

----------------------------------------
Cleaning up...
Command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-SiSPXw/lxml/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('', 'n'), __file__, 'exec'))" install --record /tmp/pip-w8kYiH-record/install-record.txt --single-version-exteally-managed --compile --user failed with error code 1 in /tmp/pip-build-SiSPXw/lxml
Storing debug log for failure in /home/gnuhealth/.pip/pip.log

[15:43:46][INFO] Bailing out !

[15:43:46][INFO] Cleaning up temp directories at /tmp/gnuhealth_installer

[15:43:46][INFO] removing base dir at /home/gnuhealth/gnuhealth
gnuhealth@taiwo-MacBookPro:~$