diff --git a/.github/workflows/manual-thingy.yml b/.github/workflows/manual-thingy.yml
index e92d225..ec7b283 100644
--- a/.github/workflows/manual-thingy.yml
+++ b/.github/workflows/manual-thingy.yml
@@ -1,21 +1,18 @@
 name: Manually Do Something
 on: workflow_dispatch
-inputs:
-  version:
-    description: "The version to release"
-    required: true
 jobs:
   job:
     runs-on: ubuntu-latest
+    if: startsWith(github.ref, "release/")
     steps:
     - name: Checkout
       uses: actions/checkout@v2
       with:
         token: ${{ secrets.GITHUB_TOKEN }}
-        ref: release/${{ github.event.inputs.version }}
     - name: Do Something
       run: |
-        git tag v${{ github.event.inputs.version }}
+        version="${${{ github.ref }}:8}" # trim starting 'release/' (8 chars)
+        git tag v$version
         git config user.email "github-actions@zpqrtbnk.net"
         git config user.name "GitHub Actions (Do Something)"
         git push --tags