diff --git a/config.aljibe.yaml b/config.aljibe.yaml
index 07a340c..edf9878 100644
--- a/config.aljibe.yaml
+++ b/config.aljibe.yaml
@@ -1,3 +1,10 @@
+# Custom config to alter composer executable in case Drupal is defining a custom version.
+# See https://github.com/ddev/ddev/issues/6602 for more details.
 hooks:
- post-start:
-   - exec: test -f /var/www/html/vendor/bin/composer && rm -f /usr/local/bin/composer && ln -s  /var/www/html/vendor/bin/composer /usr/local/bin/composer
+  pre-composer:
+   - exec: |
+           if [ -f /var/www/html/vendor/bin/composer ] && \
+              [ "$(readlink /usr/local/bin/composer)" != "/var/www/html/vendor/bin/composer" ]; then \
+              rm -f /usr/local/bin/composer && \
+              ln -s /var/www/html/vendor/bin/composer /usr/local/bin/composer; \
+           fi
\ No newline at end of file