diff --git a/docker/volumes/functions/main/index.ts b/docker/volumes/functions/main/index.ts
index 8d00102c0ec..fee63d44e75 100644
--- a/docker/volumes/functions/main/index.ts
+++ b/docker/volumes/functions/main/index.ts
@@ -151,7 +151,10 @@ Deno.serve(async (req: Request) => {
   // Using a common Import Map for all functions 
   // to use a scope 'deno.json' it must be dinamically resolved base on the 'service_name'
   const importMapPath = `/home/deno/functions/deno.jsonc`
-  const envVarsObj = Deno.env.toObject()
+  // SUPABASE_FUNCTION_SLUG is listed after the container env snapshot so
+  // nothing in it can shadow the value, and it is per-request because only this
+  // worker knows which function the request resolved to.
+  const envVarsObj = { ...Deno.env.toObject(), SUPABASE_FUNCTION_SLUG: service_name }
   const envVars = Object.keys(envVarsObj).map((k) => [k, envVarsObj[k]])
 
   try {