diff --git a/rules/solve_electricity.smk b/rules/solve_electricity.smk
index c396ebd5..2c956097 100644
--- a/rules/solve_electricity.smk
+++ b/rules/solve_electricity.smk
@@ -11,6 +11,9 @@ rule solve_network:
         co2_sequestration_potential=config["sector"].get(
             "co2_sequestration_potential", 200
         ),
+        custom_extra_functionality=workflow.source_path(
+            config["solving"]["options"].get("custom_extra_functionality", "")
+        ),
     input:
         network=RESOURCES + "networks/elec_s{simpl}_{clusters}_ec_l{ll}_{opts}.nc",
         config=RESULTS + "config.yaml",