diff --git a/trial.sh b/trial.sh
index c9089b9..1a76850 100755
--- a/trial.sh
+++ b/trial.sh
@@ -27,9 +27,9 @@ psql -v "ON_ERROR_STOP=true" --echo-queries --file="conflation.sql" "${DBNAME}"
 
 
 # Split into tasks
-mkdir "out"
-mkdir "out/intersecting"
-mkdir "out/clean"
+mkdir -p "out"
+mkdir -p "out/intersecting"
+mkdir -p "out/clean"
 
 for intersects in false true; do
     if ${intersects}; then
@@ -40,6 +40,8 @@ for intersects in false true; do
         intersectsQuery="not conflated"
     fi
 
+    rm "out/grouped_${outdir}_buildings_zones.geojson";
+
     # The purpose of the out/*/buildings*.osm files is to publicly host, split, ready for tasking
     # https://codeforsanjose.github.io/OSM-SouthBay/SJ_Buildings/out/clean/buildings_1323.osm