troubleshoot go cache location

.drone.sh

@@ -5,7 +5,10 @@ export CGO_ENABLED=0
 
 export now=$(TZ=Australia/Sydney date '+%Y%m%d-%H%M%S')
 echo $now
-make drone-cache
+go env GOCACHE
+GOCACHE=/tmp/cache
+export GOCACHE
+go env GOCACHE
 echo "build commences"
 go build -ldflags "-X main.sha1ver=`git rev-parse HEAD` -X main.buildTime=$now" -o smt
 echo "build complete"

.drone.yml

@@ -26,9 +26,9 @@ steps:
     restore: true
     cache_key: "volume"
     archive_format: "gzip"
-    # filesystem_cache_root: "/tmp/cache"
+    filesystem_cache_root: "/tmp/cache"
-    mount:
+    #mount:
-      - 'vendor'
+    #  - 'vendor'
   volumes:
   - name: cache
     path: /tmp/cache  
@@ -51,9 +51,9 @@ steps:
     rebuild: true
     cache_key: "volume"
     archive_format: "gzip"
-    # filesystem_cache_root: "/tmp/cache"
+    filesystem_cache_root: "/tmp/cache"
-    mount:
+    #mount:
-      - 'vendor'
+    #  - 'vendor'
   volumes:
   - name: cache
     path: /tmp/cache