diff --git a/.github/workflows/release-tip.yml b/.github/workflows/release-tip.yml
index df9bcaac7..982969c4d 100644
--- a/.github/workflows/release-tip.yml
+++ b/.github/workflows/release-tip.yml
@@ -105,7 +105,8 @@ jobs:
           MINISIGN_KEY: ${{ secrets.MINISIGN_KEY }}
         run: |
           echo $MINISIGN_KEY > minisign.key
-          echo $MINISIGN_PASSWORD | minisign -S \
+          echo $MINISIGN_PASSWORD | nix develop -c \
+            minisign -S \
             -m ghostty-source.tar.gz \
             -s minisign.key
       - name: Update Release