diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7b1640a..4ab663d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,9 +35,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2.3.4
+      uses: actions/checkout@v2.3.5
     - name: Install nix
-      uses: cachix/install-nix-action@v13
+      uses: cachix/install-nix-action@v14.1
       with:
         nix_path: "${{ matrix.nixPath }}"
     - name: Show nixpkgs version
@@ -59,7 +59,7 @@ jobs:
           -I $PWD
     - name: Build nix packages
       # 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
+      run: nix --extra-experimental-features 'nix-command flakes' shell -I 'nixpkgs=channel:nixos-unstable' nixpkgs#nix-build-uncached -c nix-build-uncached ci.nix -A cacheOutputs
     - name: Trigger NUR update
       if: ${{ matrix.nurRepo != '<YOUR_REPO_NAME>' }}
       run: curl -XPOST "https://nur-update.herokuapp.com/update?repo=${{ matrix.nurRepo }}"