diff --git a/.github/workflows/workflow.yaml b/.github/workflows/workflow.yaml
index 48d44d690..e3d50c447 100644
--- a/.github/workflows/workflow.yaml
+++ b/.github/workflows/workflow.yaml
@@ -1,12 +1,7 @@
 name: Continuous integration
 on:
   push:
-    branches: master
-  pull_request:
-    branches: master
   workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '1 11 * * *'
 env:
   # Bump this number to invalidate the GH actions cache
   cache-version: 0
@@ -16,49 +11,16 @@ concurrency:
   cancel-in-progress: ${{ github.ref != 'refs/heads/master' }}
 
 jobs:
-  lint:
-    name: Format & Lint
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: tweag/configure-bazel-remote-cache-auth@v0
-        with:
-          buildbuddy_api_key: ${{ secrets.BUILDBUDDY_API_KEY }}
-          bazelrc_path: .bazelrc.auth
-      - uses: ./.github/actions/set_tcp_keepalive_time
-      - uses: ./.github/actions/authenticate_github_api
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-      - name: Configure
-        run: |
-          cat >>.bazelrc.local <<EOF
-          common --config=ci
-          EOF
-      - run: |
-          bazelisk test buildifier:buildifier_test
-
   test-nixpkgs:
     name: Build & Test - Nixpkgs
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-11]
-        module: [rules_haskell, rules_haskell_nix, rules_haskell_tests]
-        bzlmod: [true, false]
+        os: [macos-11, macos-latest]
+        module: [rules_haskell_tests]
+        bzlmod: [false]
         ghc:
-          - 9.2.8
-          - 9.4.6
           - 9.6.2
-        exclude:
-          - module: rules_haskell_nix
-
-            bzlmod: false
-          # TODO: in a MODULE.bazel file we declare version specific dependencies, would need to use stack snapshot json
-          #       and stack config per GHC version
-          - ghc: 9.4.6
-            bzlmod: true
-          - ghc: 9.6.2
-            bzlmod: true
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -121,13 +83,8 @@ jobs:
           nix-shell --arg docTools false --argstr ghcVersion ${{ matrix.ghc }} --pure --run '
             set -euo pipefail
             cd rules_haskell_tests
-            # XXX run start script `--with-bzlmod=true` when supported
-            if ! ${{ matrix.bzlmod }}; then
-              ./tests/run-start-script.sh --use-nix --with-bzlmod=${{ matrix.bzlmod }}
-            fi
             bazel build //tests:run-tests
             ./bazel-ci-bin/tests/run-tests
-            bazel coverage //...
             '
 
   test-bindist:
@@ -135,35 +92,23 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-11, windows-latest]
-        module: [rules_haskell, rules_haskell_tests]
-        bzlmod: [true, false]
+        os: [macos-11, macos-latest]
+        module: [rules_haskell_tests]
+        bzlmod: [false]
         ghc:
-          - 9.2.8
-          - 9.4.6
           - 9.6.2
-        exclude:
-          # TODO: in a MODULE.bazel file we declare version specific dependencies, would need to use stack snapshot json
-          #       and stack config per GHC version
-          - ghc: 9.4.6
-            bzlmod: true
-          - ghc: 9.6.2
-            bzlmod: true
-          # currently proto-lens-protoc fails with an access violation on Windows
-          - ghc: 9.6.2
-            os: windows-latest
     env:
       # prevent auto-detection of system compilers on Windows
       BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN: ${{ matrix.os == 'windows-latest' && 1 || 0 }}
       # do not use Xcode on macOS
-      BAZEL_USE_CPP_ONLY_TOOLCHAIN: ${{ matrix.os == 'macos-11' && 1 || 0 }}
+      BAZEL_USE_CPP_ONLY_TOOLCHAIN: 1
       GHC_VERSION: ${{ matrix.ghc }}
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - uses: ./.github/actions/free_disk_space_on_linux
       - uses: ./.github/actions/install_apt_pkgs
-        with: 
+        with:
           packages: libtinfo5
       - name: Mount Bazel cache
         uses: actions/cache@v3
@@ -226,13 +171,8 @@ jobs:
         shell: bash
         run: |
           cd rules_haskell_tests
-          ./tests/run-start-script.sh --use-bindists --with-bzlmod=${{ matrix.bzlmod }}
-          # Quote the package specifier so that it works on Windows
-          bazel test "//..."
-          # Test stack_snapshot pinning
-          # NOTE keep in sync with tests/RunTests.hs
-          bazel run @stackage-pinning-test-unpinned//:pin
-          bazel build @stackage-pinning-test//:hspec
+          bazel build //tests:run-tests
+          ./bazel-ci-bin/tests/run-tests
 
       - name: Collect Logs
         id: collect_logs
@@ -254,15 +194,3 @@ jobs:
         with:
           name: Logs ${{ matrix.os }} ${{ matrix.module }} ${{ matrix.bzlmod }}
           path: logs
-
-  all_ci_tests:
-    runs-on: ubuntu-latest
-    needs:
-      - lint
-      - test-nixpkgs
-      - test-bindist
-    if: ${{ always() }}
-    steps:
-      - uses: cgrindel/gha_join_jobs@794a2d117251f22607f1aab937d3fd3eaaf9a2f5 # v1
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/rules_haskell_tests/tests/haskell_module/dep-narrowing-th/BUILD.bazel b/rules_haskell_tests/tests/haskell_module/dep-narrowing-th/BUILD.bazel
index 4e18f5484..88b4f39d6 100644
--- a/rules_haskell_tests/tests/haskell_module/dep-narrowing-th/BUILD.bazel
+++ b/rules_haskell_tests/tests/haskell_module/dep-narrowing-th/BUILD.bazel
@@ -97,7 +97,7 @@ haskell_library(
     tags = [
         # skip building this target on macos with GHC 9.6.2 since it crashes ghc-iserv
         # see https://github.com/tweag/rules_haskell/issues/2073
-        "dont_build_on_macos_with_ghc_9.6.2",
+        #"dont_build_on_macos_with_ghc_9.6.2",
     ],
     deps = [
         ":NonModulesTestLib",
@@ -121,7 +121,7 @@ haskell_test(
     tags = [
         # skip testing this target on macos with GHC 9.6.2 since it crashes ghc-iserv
         # see https://github.com/tweag/rules_haskell/issues/2073
-        "dont_build_on_macos_with_ghc_9.6.2",
+        #"dont_build_on_macos_with_ghc_9.6.2",
     ],
     visibility = ["//visibility:public"],
     deps = [