diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 394ce9d..9a1f7aa 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -28,23 +28,23 @@ jobs:
           cache: ${{ secrets.ATTIC_CACHE }}
           token: ${{ secrets.ATTIC_TOKEN }}
       - name: Calculate pre-drv
-        run: nix ./utils/eval-to-drv.sh pre
+        run: nix run git+https://nayeonie.com/ahuston-0/flake-update-diff --keep-hydra .
       # - name: Pull latest docker images
       #   run: nix ./utils/fetch-docker.sh
       - name: Update flake.lock (part 1)
         run: nix flake update
       - name: Calculate post-drv
-        run: nix ./utils/eval-to-drv.sh post
-      - name: Calculate diff
-        run: nix ./utils/diff-evals.sh
-      - name: Read diff into environment
-        run: |
-          delimiter="$(openssl rand -hex 8)"
-          {
-          echo "POSTDIFF<<${delimiter}"
-          cat post-diff
-          echo "${delimiter}"
-          } >> $GITHUB_ENV
+        run: nix run git+https://nayeonie.com/ahuston-0/flake-update-diff --keep-hydra .
+      # - name: Calculate diff
+      #   run: nix ./utils/diff-evals.sh
+      # - name: Read diff into environment
+      #   run: |
+      #     delimiter="$(openssl rand -hex 8)"
+      #     {
+      #     echo "POSTDIFF<<${delimiter}"
+      #     cat post-diff
+      #     echo "${delimiter}"
+      #     } >> $GITHUB_ENV
 
 
       - name: Restore flake.lock for next step