diff --git a/python-matplotlib.spec b/python-matplotlib.spec
index 6fc527d..1622f62 100644
--- a/python-matplotlib.spec
+++ b/python-matplotlib.spec
@@ -284,6 +284,7 @@ sed -i 's/\(USE_FONTCONFIG = \)False/\1True/' lib/matplotlib/font_manager.py
 
 
 %build
+%set_build_flags
 export http_proxy=http://127.0.0.1/
 
 MPLCONFIGDIR=$PWD \