diff --git a/README.md b/README.md
index df7cd1234a07f359f2db6e925d7bc1c384e4af91..5561330f06ffaaa72fb1681553b8dad832bdb622 100644
--- a/README.md
+++ b/README.md
@@ -37,12 +37,19 @@ SPDX-License-Identifier: CC0-1.0
     python src/main.py
     ```
 
+-----
+Attention: This setup assumes you have the tgclients library source code installed at `../tgclients/`; see the [development requirements](requirements.dev.txt).
+
+-----
+
 For your convenience, a Docker Compose setup is delivered with this repository that configures the service accordingly. Build and start the stack.
 
 ```sh
 docker-compose up --build
 ```
 
+This setup does not rely on a local installation of the tgclients library but instead installs the (supposedly) latest and tested compatible version of the library; see the [requirements](requirements.txt).
+
 ## Contributing
 
 Commit convention: