diff --git a/.drone.yml b/.drone.yml
index 9e6e104..442a756 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -97,6 +97,8 @@ steps:
       - go vet
       # wait until the site is output into './public'.
       - hugo-extended
+    environment:
+      GOFLAGS: -trimpath -mod=readonly -modcacherw
     commands:
       - go build -v -ldflags "-s -w -X main.Version=${DRONE_COMMIT}" .