diff --git a/.github/workflows/publish_sandbox.yaml b/.github/workflows/publish_sandbox.yaml
index 471b067..bfc439f 100644
--- a/.github/workflows/publish_sandbox.yaml
+++ b/.github/workflows/publish_sandbox.yaml
@@ -48,7 +48,6 @@ jobs:
 
       - name: Generate sandbox specification
         run: |
-          make construct-spec APIM_ENV=sandbox
           make generate-sandbox-spec
 
       - name: Deploy sandbox spec to Proxygen
diff --git a/Makefile b/Makefile
index eb55436..b64d573 100644
--- a/Makefile
+++ b/Makefile
@@ -34,6 +34,7 @@ format: ## Format and fix code
 generate-sandbox-spec: clean
 	mkdir -p build
 	mkdir -p sandbox/specification
+	$(MAKE) construct-spec APIM_ENV=sandbox
 	npm run publish 2> /dev/null
 	cp build/specification/sandbox/eligibility-signposting-api.json sandbox/specification/eligibility-signposting-api.json