ci workflow: don't check initial substituter list (#90)

* ci workflow: don't check initial substituter list

* ci workflow: s/macos-12/macos-13/g

* ci push dev shell: s/macos-12/macos-13/g

* DROP: ci debug

.github/workflows/ci.yml

@@ -70,9 +70,6 @@ jobs:
         uses: ./
         with:
           _internal-strict-mode: true
-      - name: Check the cache isn't enabled
-        run: |
-          [ $(nix config show substituters) == "https://cache.nixos.org/" ]
 
   run-systems:
     needs: build
@@ -89,7 +86,7 @@ jobs:
           - nix-system: "aarch64-darwin"
             runner: "macos-latest-xlarge"
           - nix-system: "x86_64-darwin"
-            runner: "macos-12"
+            runner: "macos-13"
           - nix-system: "aarch64-linux"
             runner: "namespace-profile-default-arm64"
           - nix-system: "x86_64-linux"
@@ -113,3 +110,9 @@ jobs:
         if: github.event_name == 'merge_group'
         run: |
           .github/workflows/cache-test.sh
+      - name: Breakpoint if tests failed
+        if: failure()
+        uses: namespacelabs/breakpoint-action@v0
+        with:
+          duration: 30m
+          authorized-users: colemickens

.github/workflows/flakehub-cache.yml

@@ -18,7 +18,7 @@ jobs:
           - nix-system: "aarch64-darwin"
             runner: "macos-latest-xlarge"
           - nix-system: "x86_64-darwin"
-            runner: "macos-12"
+            runner: "macos-13"
           - nix-system: "x86_64-linux"
             runner: "ubuntu-22.04"
     steps: