diff --git a/sagemath.spec b/sagemath.spec
index 055f4de..4559292 100644
--- a/sagemath.spec
+++ b/sagemath.spec
@@ -935,9 +935,8 @@ sed -i 's/64m/128m/' src/sage/libs/gap/util.pyx
 
 ########################################################################
 %build
+%set_build_flags
 export CC=%{__cc}
-export CFLAGS="%{optflags}"
-export CXXFLAGS="%{optflags}"
 export SAGE_PYTHON_VERSION=3
 export SAGE_ROOT=%{buildroot}%{SAGE_ROOT}
 export SAGE_LOCAL=%{buildroot}%{SAGE_LOCAL}