diff --git a/bsag/readme.md b/bsag/readme.md
index d0a30be..118ecad 100644
--- a/bsag/readme.md
+++ b/bsag/readme.md
@@ -1,6 +1,21 @@
+# Prepare host
+
+* create user like [this](https://git.wtf-eg.de/dancesWithCycles/setup/src/branch/main/doc/gnu-linux-create-user.md)
+
 # GTFS source file
 
-* download [onebusaway-gtfs-transformer-cli](http://developer.onebusaway.org/modules/onebusaway-gtfs-modules/1.3.4-SNAPSHOT/onebusaway-gtfs-transformer-cli.html)
+* checkout [repo](https://github.com/OneBusAway/onebusaway-gtfs-modules.git)
+```
+git@github.com:OneBusAway/onebusaway-gtfs-modules.git
+```
+
+* build tool
+```
+cd onebusaway-gtfs-modules
+mvn clean package
+```
+
+ATTENTION: alternative download link for [onebusaway-gtfs-transformer-cli](http://developer.onebusaway.org/modules/onebusaway-gtfs-modules/1.3.4-SNAPSHOT/onebusaway-gtfs-transformer-cli.html)
 
 * download GTFS data
 ```
@@ -9,8 +24,8 @@ wget -o ./wget-log-connect-ls-top-dhid.txt -O ./connect-ls-top-dhid.zip http://w
 
 * generate GTFS extract
 ```
-mkdir bsag
-java -jar -Xms20G -server onebusaway-gtfs-transformer-cli-1.3.4-20150503.062227-12.jar --transform=./connect-ls-top-dhid-retain-bsag.txt connect-ls-top-dhid.zip ./bsag
+mkdir <target folder>
+java -Xms20G -server -jar onebusaway-gtfs-transformer-cl-<version>.jar --transform=./connect-ls-top-dhid-retain-bsag.txt connect-ls-top-dhid.zip <target folder>
 ```
 
 * archive GTFS extract