diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 75123cb..fc64204 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -85,9 +85,6 @@ jobs:
               with:
                 files: "pr_body.template"
                 output-filename: "pr_body.md"
-            - name: template diff into PR body
-              run: |
-                nix utils/inject-diff.py
             - name: Save PR body
               id: pr_body
               uses: juliangruber/read-file-action@v1
@@ -96,7 +93,6 @@ jobs:
             - name: Remove temporary files
               run: |
                 rm pr_body.template
-                rm pr_body.md
                 rm pre.json
                 rm post.json
                 rm post-diff
@@ -106,7 +102,8 @@ jobs:
               uses: https://nayeonie.com/ahuston-0/create-pull-request@main
               with:
                 token: ${{ secrets.GH_TOKEN_FOR_UPDATES  }}
-                body: ${{ steps.pr_body.outputs.content }}
+                add-paths: flake.lock
+                body-path: pr_body.md
                 author: '"github-actions[bot]" <github-actions[bot]@users.noreply.github.com>'
                 title: 'automated: Update `flake.lock`'
                 commit-message: |