diff --git a/.github/workflows/build.yaml b/.github/workflows/test.yaml
similarity index 85%
rename from .github/workflows/build.yaml
rename to .github/workflows/test.yaml
index c6b4341..508e9c0 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/test.yaml
@@ -1,4 +1,4 @@
-name: Build
+name: Test
 
 on:
   pull_request:
@@ -49,4 +49,9 @@ jobs:
       - name: Apply test config
         # TODO permission issue in GHA if using make build
         run: |
+          sudo mv /etc/bashrc{,.before-nix-darwin}
+          sudo mv /etc/zshrc{,.before-nix-darwin}
+          sudo mv /etc/nix/nix.conf{,.before-nix-darwin}
+          sudo mv /etc/nix/nix.custom.conf{,.before-nix-darwin}
+
           sudo ./scripts/rebuild.py switch --flake "path:${GITHUB_WORKSPACE}#macos-test"
diff --git a/scripts/rebuild.py b/scripts/rebuild.py
index 661cbcd..e2ff8cb 100755
--- a/scripts/rebuild.py
+++ b/scripts/rebuild.py
@@ -50,6 +50,7 @@ def main() -> None:
             ensure_nix()
             command = [
                 "/nix/var/nix/profiles/default/bin/nix",
+                "--experimental-features", "nix-command flakes",
                 "run",
                 "nix-darwin/nix-darwin-25.11#darwin-rebuild",
                 "--",