diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c0c72015a2aa4e423b6c7e1093e3584f8afdc793..b2c295cb38732a5f8075fb7ea9f89d328f35612a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -46,10 +46,6 @@       uses: cachix/install-nix-action@v14
       with:
         nix_path: "${{ matrix.nixPath }}"
   push:
-      - main
-          experimental-features = nix-command flakes
-          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-  push:
     # rebuild everyday at 2:51
       run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
     - name: Setup cachix
@@ -70,7 +66,8 @@           --drv-path --show-trace \
           -I nixpkgs=$(nix-instantiate --find-file nixpkgs) \
           -I $PWD
     - name: Build nix packages
-      run: nix shell -f '<nixpkgs>' nix-build-uncached -c nix-build-uncached ci.nix -A cacheOutputs
+      # TODO switch to default nixpkgs channel once nix-build-uncached 1.0.0 is in stable
+      run: nix run -I 'nixpkgs=channel:nixos-unstable' nixpkgs.nix-build-uncached -c nix-build-uncached ci.nix -A cacheOutputs
     - name: Trigger NUR update
       # Don't replace <YOUR_REPO_NAME> here!
       if: ${{ matrix.nurRepo != '<YOUR_REPO_NAME>' }}