fix(ci) update-rust-toolchain

.github/workflows/update-rust-toolchain.yml

@@ -13,12 +13,13 @@ jobs:
       - name: Install Nix
         uses: cachix/install-nix-action@v16
         with:
+          nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - name: install dependencies
-        run:  nix profile install nixpkgs#jq
-      - name: install dependencies
-        run:  nix profile install nixpkgs#curl
+      - name: install jq
+        run:  nix-env -i jq -f '<nixpkgs>'
+      - name: install curl
+        run:  nix-env -if curl -f '<nixgpks>'
       - name: update rust-toolchain
         run:  assets/scripts/update-toolchain.sh
       - name: Create Pull Request