flake: add remaining drvs to ci.buildbot (#2060)

Link: https://github.com/nix-community/stylix/pull/2060

Co-authored-by: Matt Sturgeon <matt@sturgeon.me.uk>
Reviewed-by: Matt Sturgeon <matt@sturgeon.me.uk>
Reviewed-by: NAHO <90870942+trueNAHO@users.noreply.github.com>

.github/workflows/check.yml

@@ -1,60 +0,0 @@
----
-name: Check
-
-on:
-  push:
-    branches:
-      - master
-      - release-**
-  pull_request:
-
-permissions:
-  contents: read
-
-defaults:
-  run:
-    shell: bash
-
-jobs:
-  check:
-    name: ${{ matrix.name }}
-    runs-on: ${{ matrix.runs-on }}
-
-    # https://docs.github.com/en/actions/writing-workflows/choosing-where-your-workflow-runs/choosing-the-runner-for-a-job#choosing-github-hosted-runners
-    strategy:
-      matrix:
-        include:
-          - name: aarch64-linux
-            runs-on: ubuntu-24.04-arm
-          - name: aarch64-darwin
-            runs-on: macos-15
-          - name: x86_64-linux
-            runs-on: ubuntu-24.04
-          - name: x86_64-darwin
-            runs-on: macos-15-intel
-
-    steps:
-      - uses: actions/checkout@v6
-        with:
-          persist-credentials: false
-
-      # TODO: Lock this Action to a release tag once commit [1] ("fix: relocate
-      # TMPDIR to /mnt to improve Nix installer compatibility") is part of a
-      # release, resolving [2] ("does not work with cachix install nix action").
-      #
-      # [1]: https://github.com/wimpysworld/nothing-but-nix/pull/25
-      # [2]: https://github.com/wimpysworld/nothing-but-nix/issues/24
-      - uses: wimpysworld/nothing-but-nix@10c936d9e46521bf923f75458e0cbd4fa309300d  # yamllint disable-line rule:line-length
-        if: runner.os == 'Linux'
-        with:
-          hatchet-protocol: rampage
-
-      - uses: cachix/install-nix-action@v31
-
-      - uses: cachix/cachix-action@v16
-        with:
-          name: nix-community
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-        continue-on-error: true
-
-      - run: nix develop --command stylix-check --no-nom