diff --git a/.github/workflows/cabal.yml b/.github/workflows/cabal.yml
index f6fc7651..ad478daf 100644
--- a/.github/workflows/cabal.yml
+++ b/.github/workflows/cabal.yml
@@ -1,4 +1,4 @@
-name: Continuous integration with cabal
+name: Continuous integration
 
 on:
   push:
@@ -20,8 +20,11 @@ jobs:
           - "9.6.4"
           - "9.8.2"
           - "9.10.1"
+        operating-system:
+          - "ubuntu-latest"
+          - "windows-latest"
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.operating-system }}
 
     steps:
     - uses: actions/checkout@v4
@@ -35,12 +38,8 @@ jobs:
     
     - name: Generate freeze file
       run: |
-        cabal update
         cabal configure --enable-tests --test-show-details=direct
         cabal freeze --minimize-conflict-set
-        # 'cabal freeze' will use the nearest index state which might not be exactly equal
-        # to the index state specified in 'cabal.project'
-        sed '/^index-state: /d' cabal.project.freeze > dependencies-versions
     
     - name: Cache cabal work
       uses: actions/cache@v4
@@ -50,7 +49,7 @@ jobs:
           ${{ steps.setup-haskell.outputs.cabal-store }}
         # We are using the hash of 'cabal.project.local' so that different levels
         # of optimizations are cached separately
-        key: ${{ runner.os }}-${{ hashFiles('dependencies-versions', 'cabal.project', 'cabal.project.local') }}-cabal-install
+        key: ${{ runner.os }}-${{ hashFiles('cabal.project', 'cabal.project.local') }}-cabal-install
 
     - name: Build dependencies only
       run: cabal build all --only-dependencies
diff --git a/.github/workflows/stack.yml b/.github/workflows/stack.yml
deleted file mode 100644
index 4b916af8..00000000
--- a/.github/workflows/stack.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-name: Continuous integration with stack
-
-on:
-  push:
-    paths-ignore:
-      - 'website/*/**'
-      - 'README.md'
-  pull_request:
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        ghcVersion:
-          [ "8.10.7"
-          , "9.0.2"
-          , "9.2.7"
-          , "9.4.5"
-          , "9.8.2"
-          ]
-    container: "fpco/stack-build-small"
-    steps:
-      - name: Check out repository code
-        uses: actions/checkout@v2
-      - name: Cache stack dependencies
-        uses: actions/cache@v2
-        with:
-          path: ${{ github.workspace }}/stack-root
-          key: cache-key-${{ runner.os }}-${{ hashFiles(format('stack-ghc-{0}.yaml', matrix.ghcVersion)) }}
-      - shell: bash
-        name: run tests
-        run: |
-          set -ex
-          chown $(whoami) "$GITHUB_WORKSPACE"
-          export STACK_ROOT="$GITHUB_WORKSPACE/stack-root"
-          export ARGS="--stack-yaml stack-ghc-${{ matrix.ghcVersion }}.yaml"
-          export ARG='--test-arguments'
-          export TEST_PACKAGE="distributed-process-tests:"
-          stack ${ARGS} test $ARG='--plain' ${TEST_PACKAGE}TestCHInMemory
-          stack ${ARGS} test $ARG='--plain' ${TEST_PACKAGE}TestCHInTCP
-          stack ${ARGS} test $ARG='--plain -t "!SpawnReconnect"' ${TEST_PACKAGE}TestClosure
-          stack ${ARGS} test $ARG='--plain' ${TEST_PACKAGE}TestStats
-          stack ${ARGS} test $ARG='--plain' ${TEST_PACKAGE}TestMxInMemory
-          stack ${ARGS} test $ARG='--plain' ${TEST_PACKAGE}TestMxInTCP
-          stack ${ARGS} test $ARG='--plain' ${TEST_PACKAGE}TestTracingInMemory