diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index de0b62b..11ee453 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -18,7 +18,7 @@ jobs:
         id: hosts
         run: |
           hosts="$(nix eval .#nixosConfigurations --apply builtins.attrNames --json)"
-          echo "hostnames=${hosts}" >> "$GITHUB_OUTPUT"
+          echo "hostnames=${hosts}" >> "$FORGEJO_OUTPUT"
     outputs:
       hosts: ${{ steps.hosts.outputs.hostnames }}