diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9ddabc5..77953ed 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -88,15 +88,13 @@ jobs:
           hello
           nix store gc
           nix run nixpkgs#hello
-      - name: Uninstall Nix
-        run: |
-          /nix/nix-installer uninstall --no-confirm
       - name: Reinstall Nix
         uses: ./
         with:
           logger: pretty
           log-directives: nix_installer=trace
           backtrace: full
+          reinstall: true
           extra-conf: |
             use-sqlite-wal = true
       - name: Test `nix` with `$GITHUB_PATH`
@@ -174,15 +172,15 @@ jobs:
         if: success() || failure()
         run: |
           pkill magic-nix-cache
-      - name: Uninstall Nix
-        run: |
-          /nix/nix-installer uninstall --no-confirm
+      # Reinstate the MNC
+      - uses: DeterminateSystems/magic-nix-cache-action@main
       - name: Reinstall Nix
         uses: ./
         with:
           logger: pretty
           log-directives: nix_installer=trace
           backtrace: full
+          reinstall: true
           extra-conf: |
             use-sqlite-wal = true
       - name: Test `nix` with `$GITHUB_PATH`