Specify container

.github/workflows/build.yml

@@ -1,34 +0,0 @@
-name: "Build"
-on:
-  pull_request:
-
-jobs:
-  determine_hosts:
-    name: "Determining hosts to build"
-    runs-on: ubuntu-latest
-    container:
-      image: catthehacker/ubuntu:act-latest
-
-    steps:
-      - uses: actions/checkout@v5
-      - uses: https://github.com/cachix/install-nix-action@v31
-        with:
-          nix_path: nixpkgs=channel:nixos-unstable
-      - name: "List hosts"
-        id: hosts
-        run: nix eval .#nixosConfigurations --apply builtins.attrNames --json
-    outputs:
-      hosts: ${{ steps.hosts.outputs }}
-
-  build:
-    runs-on: ubuntu-latest
-    container:
-      image: catthehacker/ubuntu:act-latest
-    needs: determine_hosts
-    strategy:
-      matrix:
-        hostname: ${{ fromJSON(needs.determine_hosts.outputs.hosts) }}
-
-    steps:
-      - run: echo "${{ matrix.hostname }}"
-