diff --git a/_config b/_config
new file mode 100644
index 0000000..0facce4
--- /dev/null
+++ b/_config
@@ -0,0 +1,6 @@
+# configs below has limited to standard repo in/from SUSE:SLFO:Main:Build prjconf
+# not to limit these configs in Backports project since we do use leap_16 repo
+Prefer: gcc-build-fortran
+Substitute: gcc-d gcc-build-d
+
+Preinstall: libeconf0