Use pip install instead of deprecated python setup.py install command
diff --git a/lib/py/Makefile.am b/lib/py/Makefile.am
index b76a7dc..4777ccf 100644
--- a/lib/py/Makefile.am
+++ b/lib/py/Makefile.am
@@ -45,7 +45,7 @@
 # Old version (can't put inline because it's not portable).
 #$(PYTHON) setup.py install --prefix=$(prefix) --root=$(DESTDIR) $(PYTHON_SETUPUTIL_ARGS)
 install-exec-hook:
-	$(PYTHON) setup.py install --root=$(DESTDIR) --prefix=$(PY_PREFIX) $(PYTHON_SETUPUTIL_ARGS)
+	$(PYTHON) -m pip install . --root=$(DESTDIR) --prefix=$(PY_PREFIX) $(PYTHON_SETUPUTIL_ARGS)
 
 check-local: all py3-test
 	$(PYTHON) test/thrift_json.py