workflow: fix typo and don't build on macos

.github/workflows/build-packages.yml

@@ -26,8 +26,8 @@ jobs:
         os:
           - ubuntu-latest
           - ubuntu-24.04-arm
-          - macos-latest
-          - macos-13
+          # - macos-latest
+          # - macos-13
     runs-on: ${{ matrix.os }}
     steps:
       - name: setup binary cache key
@@ -42,7 +42,7 @@ jobs:
       - name: cache result
         if: always()
         run: |
-          nix copy "${{ matrix.machine }}" --to "s3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem"
+          nix copy "${{ matrix.package }}" --to "s3://nixcache?endpoint=s3.cy7.sh&secret-key=/home/runner/cache-priv-key.pem"
       - name: prepare tarball to upload
         run: nix run github:nixos/nixpkgs#gnutar hcvf result.tar result
       - name: upload result