diff --git a/.github/workflows/release-builtins.yml b/.github/workflows/release-builtins.yml
index 6f41709..917dd3d 100644
--- a/.github/workflows/release-builtins.yml
+++ b/.github/workflows/release-builtins.yml
@@ -1,6 +1,6 @@
 name: Publish ua-parser builtins
 
-run-name: Publish ${{ inputs.tag || 'master' }} to ${{ inputs.environment || 'dummy' }}
+run-name: Publish ${{ inputs.tag || 'master' }} to ${{ inputs.environment || 'pypy (scheduled)' }}
 
 on:
   schedule:
@@ -11,9 +11,11 @@ on:
       tag:
         description: "uap-core ref to release"
         type: string
+        required: true
       environment:
         description: "environment to release for (testpypy or pypy)"
         type: environment
+        required: true
 
 jobs:
   build:
@@ -28,7 +30,7 @@ jobs:
         persist-credentials: false
     - name: update core
       env:
-        TAG: ${{ inputs.tag || 'master '}}
+        TAG: ${{ inputs.tag || 'origin/master '}}
       # needs to detach because we can update to a tag
       run: git -C uap-core switch --detach "$TAG"
     - name: Set up Python