diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
new file mode 100644
index 0000000..55a63c9
--- /dev/null
+++ b/.github/workflows/ci.yaml
@@ -0,0 +1,31 @@
+name: Haskell CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ghc: ['8.0', '8.2', '8.4', '8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10', '9.12']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: haskell-actions/setup@v2
+        id: setup-haskell
+        with:
+          ghc-version: ${{ matrix.ghc }}
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ${{ steps.setup-haskell.outputs.cabal-store }}
+            dist-newstyle
+          key: ${{ runner.os }}-${{ matrix.ghc }}
+      - name: Build
+        run: cabal build
diff --git a/.github/workflows/haskell-ci.yml b/.github/workflows/haskell-ci.yml
deleted file mode 100644
index 9bec4d3..0000000
--- a/.github/workflows/haskell-ci.yml
+++ /dev/null
@@ -1,273 +0,0 @@
-# This GitHub workflow config has been generated by a script via
-#
-#   haskell-ci 'github' 'parallel.cabal'
-#
-# To regenerate the script (for example after adjusting tested-with) run
-#
-#   haskell-ci regenerate
-#
-# For more information, see https://github.com/andreasabel/haskell-ci
-#
-# version: 0.19.20241219
-#
-# REGENDATA ("0.19.20241219",["github","parallel.cabal"])
-#
-name: Haskell-CI
-on:
-  push:
-    branches:
-      - master
-  pull_request:
-    branches:
-      - master
-jobs:
-  linux:
-    name: Haskell-CI - Linux - ${{ matrix.compiler }}
-    runs-on: ubuntu-20.04
-    timeout-minutes:
-      60
-    container:
-      image: buildpack-deps:jammy
-    continue-on-error: ${{ matrix.allow-failure }}
-    strategy:
-      matrix:
-        include:
-          - compiler: ghc-9.12.1
-            compilerKind: ghc
-            compilerVersion: 9.12.1
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-9.10.1
-            compilerKind: ghc
-            compilerVersion: 9.10.1
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-9.8.4
-            compilerKind: ghc
-            compilerVersion: 9.8.4
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-9.6.6
-            compilerKind: ghc
-            compilerVersion: 9.6.6
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-9.4.8
-            compilerKind: ghc
-            compilerVersion: 9.4.8
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-9.2.8
-            compilerKind: ghc
-            compilerVersion: 9.2.8
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-9.0.2
-            compilerKind: ghc
-            compilerVersion: 9.0.2
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.10.7
-            compilerKind: ghc
-            compilerVersion: 8.10.7
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.8.4
-            compilerKind: ghc
-            compilerVersion: 8.8.4
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.6.5
-            compilerKind: ghc
-            compilerVersion: 8.6.5
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.4.4
-            compilerKind: ghc
-            compilerVersion: 8.4.4
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.2.2
-            compilerKind: ghc
-            compilerVersion: 8.2.2
-            setup-method: ghcup
-            allow-failure: false
-          - compiler: ghc-8.0.2
-            compilerKind: ghc
-            compilerVersion: 8.0.2
-            setup-method: ghcup
-            allow-failure: false
-      fail-fast: false
-    steps:
-      - name: apt-get install
-        run: |
-          apt-get update
-          apt-get install -y --no-install-recommends gnupg ca-certificates dirmngr curl git software-properties-common libtinfo5 libnuma-dev
-      - name: Install GHCup
-        run: |
-          mkdir -p "$HOME/.ghcup/bin"
-          curl -sL https://downloads.haskell.org/ghcup/0.1.30.0/x86_64-linux-ghcup-0.1.30.0 > "$HOME/.ghcup/bin/ghcup"
-          chmod a+x "$HOME/.ghcup/bin/ghcup"
-      - name: Install cabal-install (prerelease)
-        run: |
-          "$HOME/.ghcup/bin/ghcup" config add-release-channel https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-prereleases-0.0.8.yaml;
-          "$HOME/.ghcup/bin/ghcup" install cabal 3.15.0.0.2024.10.3 || (cat "$HOME"/.ghcup/logs/*.* && false)
-          echo "CABAL=$HOME/.ghcup/bin/cabal-3.15.0.0.2024.10.3 -vnormal+nowrap" >> "$GITHUB_ENV"
-      - name: Install GHC (GHCup)
-        if: matrix.setup-method == 'ghcup'
-        run: |
-          "$HOME/.ghcup/bin/ghcup" install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
-          HC=$("$HOME/.ghcup/bin/ghcup" whereis ghc "$HCVER")
-          HCPKG=$(echo "$HC" | sed 's#ghc$#ghc-pkg#')
-          HADDOCK=$(echo "$HC" | sed 's#ghc$#haddock#')
-          echo "HC=$HC" >> "$GITHUB_ENV"
-          echo "HCPKG=$HCPKG" >> "$GITHUB_ENV"
-          echo "HADDOCK=$HADDOCK" >> "$GITHUB_ENV"
-        env:
-          HCKIND: ${{ matrix.compilerKind }}
-          HCNAME: ${{ matrix.compiler }}
-          HCVER: ${{ matrix.compilerVersion }}
-      - name: Set PATH and environment variables
-        run: |
-          echo "$HOME/.cabal/bin" >> $GITHUB_PATH
-          echo "LANG=C.UTF-8" >> "$GITHUB_ENV"
-          echo "CABAL_DIR=$HOME/.cabal" >> "$GITHUB_ENV"
-          echo "CABAL_CONFIG=$HOME/.cabal/config" >> "$GITHUB_ENV"
-          HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\d+)\.(\d+)\.(\d+)(\.(\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')
-          echo "HCNUMVER=$HCNUMVER" >> "$GITHUB_ENV"
-          echo "ARG_TESTS=--enable-tests" >> "$GITHUB_ENV"
-          echo "ARG_BENCH=--enable-benchmarks" >> "$GITHUB_ENV"
-          if [ $((HCNUMVER >= 91200)) -ne 0 ] ; then echo "HEADHACKAGE=true" >> "$GITHUB_ENV" ; else echo "HEADHACKAGE=false" >> "$GITHUB_ENV" ; fi
-          echo "ARG_COMPILER=--$HCKIND --with-compiler=$HC" >> "$GITHUB_ENV"
-        env:
-          HCKIND: ${{ matrix.compilerKind }}
-          HCNAME: ${{ matrix.compiler }}
-          HCVER: ${{ matrix.compilerVersion }}
-      - name: env
-        run: |
-          env
-      - name: write cabal config
-        run: |
-          mkdir -p $CABAL_DIR
-          cat >> $CABAL_CONFIG <<EOF
-          remote-build-reporting: anonymous
-          write-ghc-environment-files: never
-          remote-repo-cache: $CABAL_DIR/packages
-          logs-dir:          $CABAL_DIR/logs
-          world-file:        $CABAL_DIR/world
-          extra-prog-path:   $CABAL_DIR/bin
-          symlink-bindir:    $CABAL_DIR/bin
-          installdir:        $CABAL_DIR/bin
-          build-summary:     $CABAL_DIR/logs/build.log
-          store-dir:         $CABAL_DIR/store
-          install-dirs user
-            prefix: $CABAL_DIR
-          repository hackage.haskell.org
-            url: http://hackage.haskell.org/
-          EOF
-          if $HEADHACKAGE; then
-          cat >> $CABAL_CONFIG <<EOF
-          repository head.hackage.ghc.haskell.org
-             url: https://ghc.gitlab.haskell.org/head.hackage/
-             secure: True
-             root-keys: 7541f32a4ccca4f97aea3b22f5e593ba2c0267546016b992dfadcd2fe944e55d
-                        26021a13b401500c8eb2761ca95c61f2d625bfef951b939a8124ed12ecf07329
-                        f76d08be13e9a61a377a85e2fb63f4c5435d40f8feb3e12eb05905edb8cdea89
-             key-threshold: 3
-          active-repositories: hackage.haskell.org, head.hackage.ghc.haskell.org:override
-          EOF
-          fi
-          cat >> $CABAL_CONFIG <<EOF
-          program-default-options
-            ghc-options: $GHCJOBS +RTS -M3G -RTS
-          EOF
-          cat $CABAL_CONFIG
-      - name: versions
-        run: |
-          $HC --version || true
-          $HC --print-project-git-commit-id || true
-          $CABAL --version || true
-      - name: update cabal index
-        run: |
-          $CABAL v2-update -v
-      - name: install cabal-plan
-        run: |
-          mkdir -p $HOME/.cabal/bin
-          curl -sL https://github.com/haskell-hvr/cabal-plan/releases/download/v0.7.3.0/cabal-plan-0.7.3.0-x86_64-linux.xz > cabal-plan.xz
-          echo 'f62ccb2971567a5f638f2005ad3173dba14693a45154c1508645c52289714cb2  cabal-plan.xz' | sha256sum -c -
-          xz -d < cabal-plan.xz > $HOME/.cabal/bin/cabal-plan
-          rm -f cabal-plan.xz
-          chmod a+x $HOME/.cabal/bin/cabal-plan
-          cabal-plan --version
-      - name: checkout
-        uses: actions/checkout@v4
-        with:
-          path: source
-      - name: initial cabal.project for sdist
-        run: |
-          touch cabal.project
-          echo "packages: $GITHUB_WORKSPACE/source/." >> cabal.project
-          cat cabal.project
-      - name: sdist
-        run: |
-          mkdir -p sdist
-          $CABAL sdist all --output-dir $GITHUB_WORKSPACE/sdist
-      - name: unpack
-        run: |
-          mkdir -p unpacked
-          find sdist -maxdepth 1 -type f -name '*.tar.gz' -exec tar -C $GITHUB_WORKSPACE/unpacked -xzvf {} \;
-      - name: generate cabal.project
-        run: |
-          PKGDIR_parallel="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/parallel-[0-9.]*')"
-          echo "PKGDIR_parallel=${PKGDIR_parallel}" >> "$GITHUB_ENV"
-          rm -f cabal.project cabal.project.local
-          touch cabal.project
-          touch cabal.project.local
-          echo "packages: ${PKGDIR_parallel}" >> cabal.project
-          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "package parallel" >> cabal.project ; fi
-          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
-          cat >> cabal.project <<EOF
-          EOF
-          if $HEADHACKAGE; then
-          echo "allow-newer: $($HCPKG list --simple-output | sed -E 's/([a-zA-Z-]+)-[0-9.]+/*:\1,/g')" >> cabal.project
-          fi
-          $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(parallel)$/; }' >> cabal.project.local
-          cat cabal.project
-          cat cabal.project.local
-      - name: dump install plan
-        run: |
-          $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
-          cabal-plan
-      - name: restore cache
-        uses: actions/cache/restore@v4
-        with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
-          path: ~/.cabal/store
-          restore-keys: ${{ runner.os }}-${{ matrix.compiler }}-
-      - name: install dependencies
-        run: |
-          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --dependencies-only -j2 all
-          $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dependencies-only -j2 all
-      - name: build w/o tests
-        run: |
-          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
-      - name: build
-        run: |
-          $CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --write-ghc-environment-files=always
-      - name: cabal check
-        run: |
-          cd ${PKGDIR_parallel} || false
-          ${CABAL} -vnormal check
-      - name: haddock
-        run: |
-          $CABAL v2-haddock --disable-documentation --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all
-      - name: unconstrained build
-        run: |
-          rm -f cabal.project.local
-          $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
-      - name: save cache
-        if: always()
-        uses: actions/cache/save@v4
-        with:
-          key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
-          path: ~/.cabal/store
diff --git a/cabal.haskell-ci b/cabal.haskell-ci
deleted file mode 100644
index 2ae666f..0000000
--- a/cabal.haskell-ci
+++ /dev/null
@@ -1,7 +0,0 @@
-branches: master
-
--- constraint-set containers-0.7
---   ghc: >= 8.2 && < 9.7
---   constraints: containers ^>= 0.7
---   tests: True
---   run-tests: True
diff --git a/parallel.cabal b/parallel.cabal
index d7e16c5..7106986 100644
--- a/parallel.cabal
+++ b/parallel.cabal
@@ -12,10 +12,10 @@ category:       Control, Parallelism
 build-type:     Simple
 
 tested-with:
-  GHC == 9.12.1
+  GHC == 9.12.2
   GHC == 9.10.1
   GHC == 9.8.4
-  GHC == 9.6.6
+  GHC == 9.6.7
   GHC == 9.4.8
   GHC == 9.2.8
   GHC == 9.0.2
@@ -25,13 +25,6 @@ tested-with:
   GHC == 8.4.4
   GHC == 8.2.2
   GHC == 8.0.2
-  -- Drop these old GHCs from CI:
-  -- GHC == 7.10.3
-  -- GHC == 7.8.4
-  -- GHC == 7.6.3
-  -- GHC == 7.4.2
-  -- GHC == 7.2.2
-  -- GHC == 7.0.4
 
 description:
     This package provides a library for parallel programming.