diff --git a/ci/scripts/build-docs.sh b/ci/scripts/build-docs.sh
index b2c7e45fbb..d8e68b2723 100755
--- a/ci/scripts/build-docs.sh
+++ b/ci/scripts/build-docs.sh
@@ -24,7 +24,7 @@ ninja -C "$builddir" update_girs
 git checkout $(git ls-files 'subprojects/*.wrap')
 ./ci/scripts/check-diff.py "gir files"
 
-./gst-env.py ninja -C "$builddir" plugins_doc_caches
+./gst-env.py --builddir "$builddir" ninja -C "$builddir" plugins_doc_caches
 
 # Ignore modifications to wrap files made by meson
 git checkout $(git ls-files 'subprojects/*.wrap')