From fc51d80a27af21c1df7efbddaf6af046e0b11055 Mon Sep 17 00:00:00 2001
From: Niklas Mohrin <dev@niklasmohrin.de>
Date: Thu, 23 Nov 2023 01:42:58 +0100
Subject: [PATCH] More options for caching

---
 .github/workflows/build.yml | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 15ecd2d..0b99c4b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,12 +10,17 @@ jobs:
     - uses: cachix/install-nix-action@v22
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
-        extra_nix_config: "store = /home/runner/nix"
+        extra_nix_config: |
+          store = /home/runner/nix
+          auto-optimise-store = true
+          keep-outputs = true
+          keep-derivations = true
     - name: Cache Nix
       uses: actions/cache@v3.3.0
       with:
         key: ${{ hashfiles('flake.nix') }}
         path: ~/nix
+    # See https://github.com/actions/cache/issues/749#issuecomment-1551707934
     - run: nix build '.#nactl'
     - run: cp /home/runner/nix$(realpath result) nactl.pdf
     - run: nix build '.#kactl'