From 910d7fbef7c2d13327109c0ed6cc93f2681432d6 Mon Sep 17 00:00:00 2001
From: NullBite <me@nullbite.com>
Date: Tue, 4 Feb 2025 12:11:12 -0500
Subject: [PATCH] actions: use nix-fast-build

---
 .github/workflows/proactive-update.yaml | 8 ++++----
 flake.nix                               | 6 ++++++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/proactive-update.yaml b/.github/workflows/proactive-update.yaml
index fd2c39d..2eff9c8 100644
--- a/.github/workflows/proactive-update.yaml
+++ b/.github/workflows/proactive-update.yaml
@@ -22,7 +22,7 @@ jobs:
       # free useless disk space
       - run: 'bash ci/util_free_space_extreme.sh'
       - run: 'nix flake update'
-      - run: 'nix build .#nixosConfigurations.rpi4.config.system.build.toplevel'
+      - run: 'nix develop .#ci --command nix-fast-build --no-nom --skip-cache -f .#nixosConfigurations.rpi4.config.system.build.toplevel'
 
   build_x86:
     runs-on: ubuntu-24.04
@@ -38,6 +38,6 @@ jobs:
       # free useless disk space
       - run: 'bash ci/util_free_space_extreme.sh'
       - run: 'nix flake update'
-      - run: 'nix build .#nixosConfigurations.nullbox.config.system.build.toplevel'
-      - run: 'nix build .#nixosConfigurations.slab.config.system.build.toplevel'
-      - run: 'nix build .#nixosConfigurations.nixos-wsl.config.system.build.toplevel'
+      - run: 'nix develop .#ci --command nix-fast-build --no-nom --skip-cache -f .#nixosConfigurations.nullbox.config.system.build.toplevel'
+      - run: 'nix develop .#ci --command nix-fast-build --no-nom --skip-cache -f .#nixosConfigurations.slab.config.system.build.toplevel'
+      - run: 'nix develop .#ci --command nix-fast-build --no-nom --skip-cache -f .#nixosConfigurations.nixos-wsl.config.system.build.toplevel'
diff --git a/flake.nix b/flake.nix
index fb46d1b..de0b107 100644
--- a/flake.nix
+++ b/flake.nix
@@ -343,6 +343,12 @@
     devShells = eachSystem (system: let
       pkgs = import nixpkgs-unstable { inherit system; };
     in {
+      ci = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          nix-update
+          nix-fast-build
+        ];
+      };
       default = pkgs.mkShell {
         buildInputs = with pkgs; [
           nix-update