diff --git a/.github/workflows/nix-build-and-cache.yml b/.github/workflows/nix-build-and-cache.yml
index a74a65cb..a50c00d9 100644
--- a/.github/workflows/nix-build-and-cache.yml
+++ b/.github/workflows/nix-build-and-cache.yml
@@ -22,7 +22,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: macos-15 # for macOS home-manager
+          - os: macos-12 # for macOS home-manager
           - os: ubuntu-latest
             system: "x86_64-linux"