build: run on self-hosted for now

magic-nix-cache-action has been deprecated, and getting a permission
denied error on ubuntu-latest

Author: nathanregner

.github/workflows/check.yml

@@ -8,30 +8,23 @@ on:
 
 jobs:
   cli:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # pin@main
-      - uses: DeterminateSystems/nix-installer-action@b92f66560d6f97d6576405a7bae901ab57e72b6a # pin@main
-        # with:
-        #   nix-installer-tag: v0.16.1 # https://github.com/DeterminateSystems/nix-installer/tags
-      - uses: DeterminateSystems/magic-nix-cache-action@a76a83091cd8728db8c37312dbdd0eeb1177a6c0 # pin@main
-      - uses: DeterminateSystems/flake-checker-action@078f5f7f47ee188aa6cb472527ca5984e195222d # pin@main
+      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2 # pin@main
       - name: Check flake
         run: nix flake check
 
   examples:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     strategy:
+      fail-fast: false
       matrix:
         example:
           - external-deps
           - marlin
+          - multi-env
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # pin@main
-      - uses: DeterminateSystems/nix-installer-action@b92f66560d6f97d6576405a7bae901ab57e72b6a # pin@main
-        # with:
-        #   nix-installer-tag: v0.16.1 # https://github.com/DeterminateSystems/nix-installer/tags
-      - uses: DeterminateSystems/magic-nix-cache-action@a76a83091cd8728db8c37312dbdd0eeb1177a6c0 # pin@main
+      - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2 # pin@main
       - name: Check flake
         working-directory: examples/${{ matrix.example }}
         run: nix flake check