diff --git a/docs/HACKING.md b/docs/HACKING.md
index 2ac092c38b..049f50f870 100644
--- a/docs/HACKING.md
+++ b/docs/HACKING.md
@@ -33,7 +33,9 @@ for testing purposes.
 First, install `mkosi` from the
 [GitHub repository](https://github.com/systemd/mkosi#running-mkosi-from-the-repository).
 Note that it's not possible to use your distribution's packaged version of mkosi
-as mkosi has to be installed outside of `/usr` for the following steps to work.
+as mkosi has to be installed outside of `/usr` for the following steps to work. When
+installing mkosi from the github repository, make sure to symlink it to `~/.local/bin`
+instead of `/usr/local/bin` if you want to add it to your `$PATH`.
 
 Then, you can build and run systemd executables as follows: