diff --git a/README.md b/README.md
index a962172..b5bd199 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,17 @@
 [![status-badge](https://woodpecker.kabelsalat.ch/api/badges/86/status.svg)](https://woodpecker.kabelsalat.ch/repos/86)
 
 Pipeline that builds the build images for https://git.kabelsalat.ch/s3lph/package-pipeline
+
+
+## Setup
+
+Unfortunately, woodpecker can't run jobs with custom entrypoints, so before this pipeline can run, we need to build the custom Kaniko image once by hand:
+
+```shell-session
+$ git clone <this repository>
+$ cd package-pipeline-builder
+$ docker build -t git.kabelsalat.ch/s3lph/package-pipeline-builder/kaniko:latest -f kaniko.Dockerfile .
+$ docker push git.kabelsalat.ch/s3lph/package-pipeline-builder/kaniko:latest
+```
+
+Afterward the pipeline will rebuild this image on its own.