diff --git a/Dockerfile b/Dockerfile
index 17ffc83..4563680 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -55,6 +55,7 @@ RUN set -eu; \
 # Non-composer based extensions
 # JsonConfig required by Graph.
 RUN set -euo pipefail; \
+    mkdir -p /var/www/html/extensions; \
     cd /var/www/html/extensions; \
     curl https://extdist.wmflabs.org/dist/extensions/JsonConfig-REL1_35-1b79879.tar.gz |tar -xz; \
     curl https://extdist.wmflabs.org/dist/extensions/Graph-REL1_35-69ec90a.tar.gz |tar -xz; \