diff --git a/py3c.spec b/py3c.spec
index 6c541af..ea5fc3d 100644
--- a/py3c.spec
+++ b/py3c.spec
@@ -53,13 +53,12 @@ py3c macros.
 %setup -q
 
 %build
-make %{?_smp_mflags} py3c.pc includedir=%{_includedir}
+%make_build py3c.pc includedir=%{_includedir}
 
-make %{?_smp_mflags} doc SPHINXBUILD=sphinx-build-3
+%make_build doc SPHINXBUILD=sphinx-build-3
 
 %check
-export CFLAGS="%{optflags}"
-make %{?_smp_mflags} test-python3
+%make_build test-python3
 
 %install
 make install prefix=%{buildroot}%{_prefix} includedir=%{buildroot}%{_includedir}