Use make_build macro

https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro

yelp-xsl.spec

@@ -1,6 +1,6 @@
 Name:           yelp-xsl
 Version:        3.37.90
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        XSL stylesheets for the yelp help browser
 
 License:        LGPLv2+ and GPLv2+
@@ -35,7 +35,7 @@ XSL stylesheets in yelp-xsl.
 
 %build
 %configure --enable-doc
-make %{?_smp_mflags}
+%make_build
 
 
 %install
@@ -53,6 +53,9 @@ make %{?_smp_mflags}
 
 
 %changelog
+* Tue Aug 18 2020 David King <amigadave@amigadave.com> - 3.37.90-2
+- Use make_build macro
+
 * Mon Aug 17 2020 Kalev Lember <klember@redhat.com> - 3.37.90-1
 - Update to 3.37.90