Workaround the hack.

We are using "dirty" hack which has more and more issues. It seems it does not
read requirements, so let's setup required requirement.

software/sanef/software.cfg

@@ -17,6 +17,14 @@ parts +=
 # - [instance-recipe] needs [bef_erp5-recipe] to be finished
 # - we cannot rely on anything else being executed before [eggs]
 bef_dummy = ${bef_erp5-recipe:location}
+
+# XXX: Workaround for hack;
+# slapos.core is added, as even if it is defined as dependency in bef_erp5-recipe
+# it is not being fetched, maybe because of using this crazy hack.
+# Note: Possibly everything from setup.py shall be done in same way.
+eggs +=
+  slapos.core
+
 extra-paths +=
   ${products-erp5:location}