diff --git a/mpcdf/README.md b/mpcdf/README.md
index 5a9bca9..8d1e7d3 100644
--- a/mpcdf/README.md
+++ b/mpcdf/README.md
@@ -69,7 +69,7 @@ Instead of installing your software manually, we recommend that you use Apptaine
 Run
 
 ```shell
-ln -s "/ptmp/mpp/software/container-env/bin/cenv" "$HOME/.local/bin"
+ln -sf "/ptmp/mpp/projects/software/container-env/bin/cenv" "$HOME/.local/bin/cenv"
 ```
 
 to add `cenv` to `$HOME/.local/bin` (should be on your `$PATH`).
@@ -79,7 +79,17 @@ your personal directory on `/ptmp`:
 
 ```shell
 test -e "$HOME/.cenv" && rmdir "$HOME/.cenv" # should be empty or not exist yet
-ln -s "/ptmp/mpp/`whoami`/cenv" "$HOME/.cenv"
+mkdir -p "/ptmp/mpp/$(whoami)/cenv"
+ln -sfn "/ptmp/mpp/$(whoami)/cenv" "$HOME/.cenv"
+```
+
+To avoid broken relative rootfs links when `$HOME/.cenv` is a symlink, pin `cenv`
+to the physical base path:
+
+```shell
+cat > "$HOME/.cenvrc" <<EOF
+export CENV_BASE_DIR="/ptmp/mpp/$(whoami)/cenv"
+EOF
 ```
 
 Now create an `cenv` environment named `odsl` that uses the standard ODSL Apptainer image: