diff --git a/rules/build_sector.smk b/rules/build_sector.smk
index 47c5a4d9..21a588be 100644
--- a/rules/build_sector.smk
+++ b/rules/build_sector.smk
@@ -281,7 +281,8 @@ rule build_biomass_potentials:
     output:
         biomass_potentials_all=RESOURCES
         + "biomass_potentials_all_s{simpl}_{clusters}_{planning_horizons}.csv",
-        biomass_potentials=RESOURCES + "biomass_potentials_s{simpl}_{clusters}_{planning_horizons}.csv",
+        biomass_potentials=RESOURCES
+        + "biomass_potentials_s{simpl}_{clusters}_{planning_horizons}.csv",
     threads: 1
     resources:
         mem_mb=1000,
@@ -735,9 +736,12 @@ rule prepare_sector_network:
         dsm_profile=RESOURCES + "dsm_profile_s{simpl}_{clusters}.csv",
         co2_totals_name=RESOURCES + "co2_totals.csv",
         co2="data/bundle-sector/eea/UNFCCC_v23.csv",
-        biomass_potentials=RESOURCES + "biomass_potentials_s{simpl}_{clusters}_" + "{}.csv".format(config["biomass"]["year"])
+        biomass_potentials=RESOURCES
+        + "biomass_potentials_s{simpl}_{clusters}_"
+        + "{}.csv".format(config["biomass"]["year"])
         if config["foresight"] == "overnight"
-        else RESOURCES + "biomass_potentials_s{simpl}_{clusters}_{planning_horizons}.csv",
+        else RESOURCES
+        + "biomass_potentials_s{simpl}_{clusters}_{planning_horizons}.csv",
         heat_profile="data/heat_load_profile_BDEW.csv",
         costs="data/costs_{}.csv".format(config["costs"]["year"])
         if config["foresight"] == "overnight"