diff --git a/scripts/process_subways.sh b/scripts/process_subways.sh
index 50548a5..7ede353 100755
--- a/scripts/process_subways.sh
+++ b/scripts/process_subways.sh
@@ -111,6 +111,7 @@ if [ ! -f "$SUBWAYS_PATH/process_subways.py" ]; then
 fi
 
 TMPDIR="${TMPDIR:-$SUBWAYS_PATH}"
+mkdir -p "$TMPDIR"
 
 # Downloading the latest version of the subways script
 if [ -n "${GIT_PULL-}" ]; then (
@@ -233,6 +234,10 @@ fi
 
 # Running the validation
 
+if [ -n "${DUMP-}" ]; then
+   mkdir -p "$DUMP"
+fi
+
 VALIDATION="$TMPDIR/validation.json"
 "$PYTHON" "$SUBWAYS_PATH/process_subways.py" ${QUIET:+-q} \
     -x "$FILTERED_DATA" -l "$VALIDATION" \