diff --git a/doc/configtables/costs.csv b/doc/configtables/costs.csv
index b69c0bf9..03933c18 100644
--- a/doc/configtables/costs.csv
+++ b/doc/configtables/costs.csv
@@ -1,6 +1,6 @@
 ,Unit,Values,Description
 year,--,YYYY; e.g. '2030',Year for which to retrieve cost assumptions of ``resources/costs.csv``.
-version,--,vX.X.X; e.g. 'v0.5.0',Version of ``technology-data`` repository to use.
+version,--,vX.X.X or <user>/<repo>/vX.X.X; e.g. 'v0.5.0',Version of ``technology-data`` repository to use. If this string is of the form <user>/<repo>/<version> then costs are instead retrieved from ``github.com/<user>/<repo>`` at the <version> tag.
 rooftop_share,--,float,Share of rooftop PV when calculating capital cost of solar (joint rooftop and utility-scale PV).
 social_discountrate,p.u.,float,Social discount rate to compare costs in different investment periods. 0.02 corresponds to a social discount rate of 2%.
 fill_values,--,float,Default values if not specified for a technology in ``resources/costs.csv``.
diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 11fd3df7..21094250 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -82,6 +82,8 @@ Upcoming Release
 
 * Upgrade default techno-economic assumptions to ``technology-data`` v0.8.1.
 
+* Add possibility to download cost data from custom fork of ``technology-data``.
+
 * Linearly interpolate missing investment periods in year-dependent
   configuration options.
 
diff --git a/rules/retrieve.smk b/rules/retrieve.smk
index b2c1e8d6..4b244483 100644
--- a/rules/retrieve.smk
+++ b/rules/retrieve.smk
@@ -50,7 +50,7 @@ if config["enable"].get("retrieve_irena"):
             onwind="data/existing_infrastructure/onwind_capacity_IRENA.csv",
             solar="data/existing_infrastructure/solar_capacity_IRENA.csv",
         log:
-            logs("retrieve_irena.log"),
+            "logs/retrieve_irena.log",
         resources:
             mem_mb=1000,
         retries: 2
@@ -115,7 +115,7 @@ if config["enable"]["retrieve"] and config["enable"].get(
             mem_mb=5000,
         retries: 2
         run:
-            move(input[0], output[0])
+            copyfile(input[0], output[0])
             validate_checksum(output[0], input[0])
 
 
diff --git a/scripts/add_brownfield.py b/scripts/add_brownfield.py
index 82a40e57..7e49031b 100644
--- a/scripts/add_brownfield.py
+++ b/scripts/add_brownfield.py
@@ -145,7 +145,7 @@ def disable_grid_expansion_if_limit_hit(n):
         for name, glc in glcs.iterrows():
             total_expansion = (
                 (
-                    n.lines.query("p_nom_extendable")
+                    n.lines.query("s_nom_extendable")
                     .eval(f"s_nom_min * {cols[limit_type]}")
                     .sum()
                 )
diff --git a/scripts/add_electricity.py b/scripts/add_electricity.py
index ac73cb1f..7e60203f 100755
--- a/scripts/add_electricity.py
+++ b/scripts/add_electricity.py
@@ -184,12 +184,13 @@ def sanitize_carriers(n, config):
 
 
 def sanitize_locations(n):
-    n.buses["x"] = n.buses.x.where(n.buses.x != 0, n.buses.location.map(n.buses.x))
-    n.buses["y"] = n.buses.y.where(n.buses.y != 0, n.buses.location.map(n.buses.y))
-    n.buses["country"] = n.buses.country.where(
-        n.buses.country.ne("") & n.buses.country.notnull(),
-        n.buses.location.map(n.buses.country),
-    )
+    if "location" in n.buses.columns:
+        n.buses["x"] = n.buses.x.where(n.buses.x != 0, n.buses.location.map(n.buses.x))
+        n.buses["y"] = n.buses.y.where(n.buses.y != 0, n.buses.location.map(n.buses.y))
+        n.buses["country"] = n.buses.country.where(
+            n.buses.country.ne("") & n.buses.country.notnull(),
+            n.buses.location.map(n.buses.country),
+        )
 
 
 def add_co2_emissions(n, costs, carriers):
diff --git a/scripts/build_hydro_profile.py b/scripts/build_hydro_profile.py
index b7f270b3..c4e9701e 100644
--- a/scripts/build_hydro_profile.py
+++ b/scripts/build_hydro_profile.py
@@ -202,9 +202,10 @@ if __name__ == "__main__":
 
     contained_years = pd.date_range(freq="YE", **snakemake.params.snapshots).year
     norm_year = config_hydro.get("eia_norm_year")
+    missing_years = contained_years.difference(eia_stats.index)
     if norm_year:
         eia_stats.loc[contained_years] = eia_stats.loc[norm_year]
-    elif missing_years := eia_stats.index.difference(contained_years):
+    elif missing_years.any():
         eia_stats.loc[missing_years] = eia_stats.median()
 
     inflow = cutout.runoff(
diff --git a/scripts/prepare_perfect_foresight.py b/scripts/prepare_perfect_foresight.py
index f7e8495e..fea0cef4 100644
--- a/scripts/prepare_perfect_foresight.py
+++ b/scripts/prepare_perfect_foresight.py
@@ -537,5 +537,8 @@ if __name__ == "__main__":
     # set carbon constraints
     n = set_carbon_constraints(n)
 
+    # update meta
+    n.meta = dict(snakemake.config, **dict(wildcards=dict(snakemake.wildcards)))
+
     # export network
     n.export_to_netcdf(snakemake.output[0])
diff --git a/scripts/retrieve_cost_data.py b/scripts/retrieve_cost_data.py
index eb1ef041..e236fbfd 100644
--- a/scripts/retrieve_cost_data.py
+++ b/scripts/retrieve_cost_data.py
@@ -25,9 +25,10 @@ if __name__ == "__main__":
     set_scenario_config(snakemake)
 
     version = snakemake.params.version
-    baseurl = (
-        f"https://raw.githubusercontent.com/PyPSA/technology-data/{version}/outputs/"
-    )
+    if "/" in version:
+        baseurl = f"https://raw.githubusercontent.com/{version}/outputs/"
+    else:
+        baseurl = f"https://raw.githubusercontent.com/PyPSA/technology-data/{version}/outputs/"
     filepath = Path(snakemake.output[0])
     url = baseurl + filepath.name