From 90bd5ed66bf670329327c824efd3e5d2a57689cf Mon Sep 17 00:00:00 2001
From: Tibo De Peuter <tibo@depeuter.dev>
Date: Sun, 8 Feb 2026 11:57:38 +0100
Subject: [PATCH 1/2] Determine hosts

---
 .github/workflows/build.yml | 34 ++++++++++++++++++++++++++++++++++
 .gitignore                  |  1 +
 2 files changed, 35 insertions(+)
 create mode 100644 .github/workflows/build.yml

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..2a1fb35
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,34 @@
+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 }}"
+
diff --git a/.gitignore b/.gitignore
index 485dee6..8daf605 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .idea
+result

From 4103c488b3958413b5c135fd751b9421ab01c62c Mon Sep 17 00:00:00 2001
From: Tibo De Peuter <tibo@depeuter.dev>
Date: Sun, 8 Feb 2026 11:58:43 +0100
Subject: [PATCH 2/2] Build each host

---
 .github/workflows/build.yml | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2a1fb35..482df03 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,8 @@ jobs:
           nix_path: nixpkgs=channel:nixos-unstable
       - name: "List hosts"
         id: hosts
-        run: nix eval .#nixosConfigurations --apply builtins.attrNames --json
+        run: |
+          nix eval .#nixosConfigurations --apply builtins.attrNames --json
     outputs:
       hosts: ${{ steps.hosts.outputs }}
 
@@ -30,5 +31,11 @@ jobs:
         hostname: ${{ fromJSON(needs.determine_hosts.outputs.hosts) }}
 
     steps:
-      - run: echo "${{ matrix.hostname }}"
+      - name: "Define host"
+        env:
+          hostname: ${{ matrix.hostname }}
+        run: |
+          echo "${hostname}"
+      - run: |
+          nixos-rebuild build --flake ".#${hostname}"