diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a3f86e91..892cc79e 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,7 +30,6 @@ jobs:
 
       - name: Build graph
         run: |
-          sudo apt install osmium-tool wget
           ./build-graph.sh
 
       - name: Build docker file
diff --git a/build-config.json b/build-config.json
index 5aeea626..fec2840c 100644
--- a/build-config.json
+++ b/build-config.json
@@ -6,14 +6,12 @@
       "source": "https://gtfs.api.opendatahub.com/v1/dataset/sta-time-tables/raw",
       "type": "gtfs",
       "feedId": "sta"
-    }
-    /*
-     this feed is not GTFS-compliant yet: https://github.com/noi-techpark/odh-mentor-otp/issues/168#issuecomment-1904328702
-    ,{
+    },
+    {
       "source": "https://gtfs.api.opendatahub.com/v1/dataset/skyalps-flight-data/raw",
       "type": "gtfs",
       "feedId": "skyalps"
-    }*/
+    }
   ],
   "osm": [
     {
diff --git a/build-graph.sh b/build-graph.sh
index 09ece3ed..468b2946 100755
--- a/build-graph.sh
+++ b/build-graph.sh
@@ -1,19 +1,32 @@
-#!/bin/sh
+#!/bin/bash -e
 
 # SPDX-FileCopyrightText: NOI Techpark <digital@noi.bz.it>
 #
 # SPDX-License-Identifier: CC0-1.0
 
-mkdir -p data
-
-NORTH_EASTH_PBF=data/italy-nord-est.osm.pbf
+# OSM
+NORTH_EAST_URL=https://download.geofabrik.de/europe/italy/nord-est-latest.osm.pbf
+NORTH_EAST_PBF=data/italy-nord-est.osm.pbf
 SOUTH_TYROL_PBF=data/south-tyrol.osm.pbf
 
+# OTP
 OTP_IMAGE=docker.io/opentripplanner/opentripplanner:2.5.0_2024-01-19T14-50
 
-wget -q --show-progress --no-clobber https://download.geofabrik.de/europe/italy/nord-est-latest.osm.pbf -O ${NORTH_EASTH_PBF}
-osmium extract ${NORTH_EASTH_PBF} --polygon south-tyrol.geojson -o ${SOUTH_TYROL_PBF} --overwrite
+# when on github actions then install the required tools
+if [ -n "${CI+isset}" ]; then
+  sudo apt-get -qq install osmium-tool wget
+fi
+
+mkdir -p data
+
+if [ ! -f "${NORTH_EAST_PBF}" ]; then
+  wget --progress=bar:force:noscroll ${NORTH_EAST_URL} -O ${NORTH_EAST_PBF}
+fi
+
+# cut out South Tyrol from the large North East Italy extract
+osmium extract ${NORTH_EAST_PBF} --polygon south-tyrol.geojson -o ${SOUTH_TYROL_PBF} --overwrite
 
+# actually do graph build
 docker run \
   -v .:/var/opentripplanner/:z \
   --rm \
diff --git a/osm.url b/osm.url
deleted file mode 100644
index e394007a..00000000
--- a/osm.url
+++ /dev/null
@@ -1,19 +0,0 @@
-https://overpass-api.de/api/map?bbox=9.880233649086051,46.30580331792924,10.397045932724035,46.66553146341906
-https://overpass-api.de/api/map?bbox=9.880233649086051,46.66553146341906,10.397045932724035,47.025259608908875
-https://overpass-api.de/api/map?bbox=10.397045932724035,45.94607517243942,10.91385821636202,46.30580331792924
-https://overpass-api.de/api/map?bbox=10.397045932724035,46.30580331792924,10.91385821636202,46.66553146341906
-https://overpass-api.de/api/map?bbox=10.397045932724035,46.66553146341906,10.91385821636202,47.025259608908875
-https://overpass-api.de/api/map?bbox=10.397045932724035,47.025259608908875,10.91385821636202,47.38498775439869
-https://overpass-api.de/api/map?bbox=10.91385821636202,45.94607517243942,11.430670500000003,46.30580331792924
-https://overpass-api.de/api/map?bbox=10.91385821636202,46.30580331792924,11.430670500000003,46.66553146341906
-https://overpass-api.de/api/map?bbox=10.91385821636202,46.66553146341906,11.430670500000003,47.025259608908875
-https://overpass-api.de/api/map?bbox=10.91385821636202,47.025259608908875,11.430670500000003,47.38498775439869
-https://overpass-api.de/api/map?bbox=11.430670500000003,45.94607517243942,11.947482783637987,46.30580331792924
-https://overpass-api.de/api/map?bbox=11.430670500000003,46.30580331792924,11.947482783637987,46.66553146341906
-https://overpass-api.de/api/map?bbox=11.430670500000003,46.66553146341906,11.947482783637987,47.025259608908875
-https://overpass-api.de/api/map?bbox=11.430670500000003,47.025259608908875,11.947482783637987,47.38498775439869
-https://overpass-api.de/api/map?bbox=11.947482783637987,46.30580331792924,12.464295067275971,46.66553146341906
-https://overpass-api.de/api/map?bbox=11.947482783637987,46.66553146341906,12.464295067275971,47.025259608908875
-https://overpass-api.de/api/map?bbox=11.947482783637987,47.025259608908875,12.464295067275971,47.38498775439869
-https://overpass-api.de/api/map?bbox=12.464295067275971,46.30580331792924,12.981107350913955,46.66553146341906
-https://overpass-api.de/api/map?bbox=12.464295067275971,46.66553146341906,12.981107350913955,47.025259608908875