Fix typo in Makefile (#2782)

Author: siyuan0322

Makefile

@@ -73,15 +73,15 @@ client: learning
 	cd $(CLIENT_DIR) && \
 	python3 -m pip install -r requirements.txt -r requirements-dev.txt --user && \
 	export PATH=$(PATH):$(HOME)/.local/bin && \
-	python3 setup.py build_ext --inplace --user
-	python3 -m pip install --user --no-build-isolation --editable $(CLIENT_DIRNT_DIR)
+	python3 setup.py build_ext --inplace --user && \
+	python3 -m pip install --user --no-build-isolation --editable $(CLIENT_DIR) && \
 	rm -rf $(CLIENT_DIR)/*.egg-info
 
 coordinator: client
 	cd $(COORDINATOR_DIR) && \
 	python3 -m pip install -r requirements.txt -r requirements-dev.txt --user && \
-	python3 setup.py build_builtin
-	python3 -m pip install --user --editable $(COORDINATOR_DIR)
+	python3 setup.py build_builtin && \
+	python3 -m pip install --user --editable $(COORDINATOR_DIR) && \
 	rm -rf $(COORDINATOR_DIR)/*.egg-info
 
 # We deliberately make $(ENGINE) depends on a file, and $(ENGINE)-install depends on $(ENGINE),