-<% @environment_variables.sort.each do |key, value| -%>
- <%- unless value.nil? -%>
-<%= key %>=<%= value %>
- <%- end -%>
-<% end -%>
+<%- @environment_variables.keys.sort.each do |key| -%>
+<%- if @environment_variables[key] != 'UNSET' -%>
+<%= key %>=<%= @environment_variables[key] %>
+<%- end -%>
+<%- end -%>