diff --git a/.gitea/workflows/publish-image.yml b/.gitea/workflows/publish-image.yml
index d1d5273..4a207f6 100644
--- a/.gitea/workflows/publish-image.yml
+++ b/.gitea/workflows/publish-image.yml
@@ -35,7 +35,7 @@ jobs:
         env:
           EVENT_NAME: ${{ github.event_name }}
           GIT_REF: ${{ github.ref }}
-          INPUT_TAG: ${{ github.event.inputs.tag || inputs.tag }}
+          INPUT_TAG: ${{ github.event.inputs.tag || inputs.tag || format('dev-{0}', github.sha) }}
           SERVER_URL: ${{ github.server_url }}
           REPOSITORY: ${{ github.repository }}
         run: node scripts/image-publication.mjs
diff --git a/scripts/image-publication.mjs b/scripts/image-publication.mjs
index 706b3be..3073104 100644
--- a/scripts/image-publication.mjs
+++ b/scripts/image-publication.mjs
@@ -9,7 +9,7 @@ export function imagePublication({ event, ref, inputTag, revision }) {
 
   let tag, channel;
   if (event === "workflow_dispatch") {
-    tag = inputTag || `dev-${revision.slice(0, 7)}`;
+    tag = inputTag ?? "";
     const commit = /^dev-([0-9a-f]{7,40})$/.exec(tag)?.[1];
     if (!commit || tag !== tag.trim())
       throw new Error(