diff --git a/Makefile b/Makefile
index f3577ecdc5fe..13755ce544c6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # This makefile does nothing but delegating the actual building to cmake.
 
 all:
-	@mkdir -p build && cd build && cmake .. $(python ./scripts/get_python_cmake_flags.py) && $(MAKE)
+	@mkdir -p build && cd build && cmake .. $(shell python ./scripts/get_python_cmake_flags.py) && $(MAKE)
 
 local:
 	@./scripts/build_local.sh
diff --git a/scripts/get_python_cmake_flags.py b/scripts/get_python_cmake_flags.py
index 90ba59b748e8..ad7bbe0bd045 100644
--- a/scripts/get_python_cmake_flags.py
+++ b/scripts/get_python_cmake_flags.py
@@ -35,7 +35,9 @@ lib = sysconfig.get_config_var("LIBDIR")
 if sys.platform == "darwin":
     lib = os.path.dirname(lib) + '/Python'
     if os.path.isfile(lib):
-        flags += '-DPYTHON_LIBRARY={lib}'.format(lib=lib)
+        flags += '-DPYTHON_LIBRARY={lib} '.format(lib=lib)
 
 if os.path.isfile(inc + '/Python.h'):
-    flags += '-DPYTHON_INCLUDE_DIR={inc}'.format(inc=inc)
+    flags += '-DPYTHON_INCLUDE_DIR={inc} '.format(inc=inc)
+
+print(flags, end='')