Hardcode --build target

SOURCES/macros

@@ -219,7 +219,7 @@ for k,_ in pairs(stripped_flags) do print(k .. " ") end
       for i in $(find . -name ltmain.sh) ; do \
         %{__sed} -i.backup -e 's~compiler_flags=$~compiler_flags="%{_hardened_ldflags}"~' $i \
       done ; \
-  %{_configure} --build=%{_build} --host=%{_host} \\\
+  %{_configure} --build=x86_64-redhat-linux --host=%{_host} \\\
 	--program-prefix=%{?_program_prefix} \\\
 	--disable-dependency-tracking \\\
 	%{?_configure_disable_silent_rules:--disable-silent-rules} \\\