diff --git a/rules/build_electricity.smk b/rules/build_electricity.smk
index f0338492..43be60fc 100644
--- a/rules/build_electricity.smk
+++ b/rules/build_electricity.smk
@@ -419,7 +419,9 @@ rule add_electricity:
             if config_provider("lines", "dynamic_line_rating", "activate")(w)
             else resources("networks/base.nc")
         ),
-        tech_costs=lambda w: resources(f"costs_{config_provider('costs', 'year')(w)}.csv"),
+        tech_costs=lambda w: resources(
+            f"costs_{config_provider('costs', 'year')(w)}.csv"
+        ),
         regions=resources("regions_onshore.geojson"),
         powerplants=resources("powerplants.csv"),
         hydro_capacities=ancient("data/bundle/hydro_capacities.csv"),
@@ -462,7 +464,9 @@ rule simplify_network:
         costs=config_provider("costs"),
     input:
         network=resources("networks/elec.nc"),
-        tech_costs=lambda w: resources(f"costs_{config_provider('costs', 'year')(w)}.csv"),
+        tech_costs=lambda w: resources(
+            f"costs_{config_provider('costs', 'year')(w)}.csv"
+        ),
         regions_onshore=resources("regions_onshore.geojson"),
         regions_offshore=resources("regions_offshore.geojson"),
     output:
@@ -509,7 +513,9 @@ rule cluster_network:
             if config_provider("enable", "custom_busmap", default=False)(w)
             else []
         ),
-        tech_costs=lambda w: resources(f"costs_{config_provider('costs', 'year')(w)}.csv"),
+        tech_costs=lambda w: resources(
+            f"costs_{config_provider('costs', 'year')(w)}.csv"
+        ),
     output:
         network=resources("networks/elec_s{simpl}_{clusters}.nc"),
         regions_onshore=resources("regions_onshore_elec_s{simpl}_{clusters}.geojson"),
@@ -536,7 +542,9 @@ rule add_extra_components:
         costs=config_provider("costs"),
     input:
         network=resources("networks/elec_s{simpl}_{clusters}.nc"),
-        tech_costs=lambda w: resources(f"costs_{config_provider('costs', 'year')(w)}.csv"),
+        tech_costs=lambda w: resources(
+            f"costs_{config_provider('costs', 'year')(w)}.csv"
+        ),
     output:
         resources("networks/elec_s{simpl}_{clusters}_ec.nc"),
     log:
@@ -568,7 +576,9 @@ rule prepare_network:
         autarky=config_provider("electricity", "autarky", default={}),
     input:
         resources("networks/elec_s{simpl}_{clusters}_ec.nc"),
-        tech_costs=lambda w: resources(f"costs_{config_provider('costs', 'year')(w)}.csv"),
+        tech_costs=lambda w: resources(
+            f"costs_{config_provider('costs', 'year')(w)}.csv"
+        ),
         co2_price=lambda w: resources("co2_price.csv") if "Ept" in w.opts else [],
     output:
         resources("networks/elec_s{simpl}_{clusters}_ec_l{ll}_{opts}.nc"),