diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index 914fff4..9e275f2 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -1,119 +1,197 @@
-name: Color-CI
+name: CI
 
 on:
   push:
-    branches: [ '*' ]
+    branches: [ "master", "release/**" ]
   pull_request:
-    branches: [ master ]
+    branches: [ "**" ]
+  schedule:
+    - cron: "0 5 * * 5"
 
 defaults: { run: { shell: bash } }
 
+# Cancel running workflows when a new workflow on the same PR or branch is started,
+# but put scheduled workflows into their own group
+concurrency:
+  group: ${{
+    format('{0}-{1}{2}',
+      github.workflow,
+      github.event.pull_request.number || github.ref,
+      github.event_name == 'schedule' && '-scheduled' || '')}}
+  cancel-in-progress: true
+
 jobs:
-  build:
-    name: CI
+  test-with-stack:
+    name: Stack
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
-        # resolver: [nightly -- disabled for now, some issue with installing ghc
-        resolver: [lts-20, lts-19, lts-18, lts-16, lts-14, lts-12]
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        resolver: [lts-12, lts-14, lts-16, lts-18, lts-19, lts-20, lts-21, lts-22, nightly]
         include:
-          - resolver: lts-12
+          - resolver: lts-14
             ghc: 8.4.4
-            stack-yaml: stack-extra-deps.yaml
           - resolver: lts-14
-            stack-yaml: stack-coveralls.yaml
+            ghc: 8.6.5
           - resolver: lts-16
             ghc: 8.8.4
           - resolver: lts-18
-
-          # Latest stable for MacOS: ghc-8.8.4
-          - resolver: lts-16
-            os: macos-latest
+            ghc: 8.10.7
           - resolver: lts-19
-            os: macos-latest
+            ghc: 9.0.2
           - resolver: lts-20
-            os: macos-latest
-          # Latest stable for Windows: ghc-8.6.4
+            ghc: 9.2.8
+          - resolver: lts-21
+            ghc: 9.4.8
+            stack-yaml: stack-coveralls.yaml
+          - resolver: lts-22
+            ghc: 9.6.6
+          - resolver: nightly
+            ghc: 9.8.2
+            stack-yaml: stack.yaml
+        exclude:
+          # Newer MacOS does not support older GHC:
           - resolver: lts-14
-            os: windows-latest
+            os: macOS-latest
+          - resolver: lts-16
+            os: macOS-latest
+          - resolver: lts-18
+            os: macOS-latest
           - resolver: lts-19
-            os: windows-latest
-          - resolver: lts-20
-            os: windows-latest
+            os: macOS-latest
 
     env:
-      STACK_YAML: stack.yaml
-      STACK_ARGS: '--resolver ${{ matrix.resolver }}'
-      cache-version: v5 # bump up this version to invalidate currently stored cache
+      STACK_YAML: ${{ matrix.stack-yaml || matrix.ghc != '' && format('stack.ghc-{0}.yaml', matrix.ghc) || 'stack.yaml' }}
+      STACK_ARGS: '--resolver ${{ matrix.resolver }} --system-ghc'
+      cache-version: v0 # bump up this version to invalidate currently stored cache
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
+
+    - uses: haskell-actions/setup@v2
+      id: setup-haskell-cabal
+      name: Setup Haskell
+      with:
+        ghc-version: ${{ matrix.ghc }}
+        enable-stack: true
+        stack-version: 'latest'
+        cabal-version: 'latest'
 
     - name: Cache
       id: cache
-      uses: actions/cache@v2
-      if: matrix.os != 'macos-latest'
+      uses: actions/cache@v4
       with:
         path: |
-          ~/.stack
+          ${{ steps.setup-haskell-cabal.outputs.stack-root }}
           .stack-work
-          Color/.stack-work
         key: ${{ runner.os }}-${{ matrix.resolver }}-${{ env.cache-version }}
         restore-keys: |
           ${{ runner.os }}-${{ matrix.resolver }}-${{ env.cache-version }}
-    - name: Cache
-      id: cache-macos
-      uses: actions/cache@v2
-      if: matrix.os == 'macos-latest'
-      with:
-        path: |
-          ~/.stack
-        key: ${{ runner.os }}-${{ matrix.resolver }}-${{ env.cache-version }}
-        restore-keys: |
-          ${{ runner.os }}-${{ matrix.resolver }}-${{ env.cache-version }}
-    - name: Workaround setup-exe-cache failure on macos
-      if: steps.cache-macos.outputs.cache-hit == 'true' && matrix.os == 'macos-latest'
-      run: |
-        rm -r ~/.stack/setup-exe-cache
     - name: Windows Cache
       id: cache-windows
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       if: matrix.os == 'windows-latest'
       with:
         path: |
-          C:\\Users\\RUNNER~1\\AppData\\Roaming\\stack
           C:\\Users\\RUNNER~1\\AppData\\Local\\Programs\\stack
         key: ${{ runner.os }}-${{ matrix.resolver }}-programs-${{ env.cache-version }}
         restore-keys: |
           ${{ runner.os }}-${{ matrix.resolver }}-programs-${{ env.cache-version }}
-
-    - name: Ubuntu install GHC
-      if: matrix.ghc != '' && matrix.os == 'ubuntu-latest'
+    - name: Reset modtime
       run: |
-        sudo add-apt-repository ppa:hvr/ghc -y
-        sudo apt-get update
-        sudo apt-get install ghc-${{ matrix.ghc }}
-    - name: Install Stack and local GHC
+        set -ex
+        curl -sSL https://raw.githubusercontent.com/lehins/utils/master/haskell/git-modtime/git-modtime.hs -o git-modtime.hs
+        runhaskell -- git-modtime.hs -f .stack-work-root/tree-contents.txt
+    - name: Build
       run: |
         set -ex
-        curl -sSL https://get.haskellstack.org/ | sh -s - -f
-        curl -sSL https://raw.githubusercontent.com/lehins/utils/786c3fe7e9e1345d7b403019f52e344627224edf/haskell/git-modtime/git-modtime.hs -o git-modtime.hs
-        [ -n "${{ matrix.ghc }}" ] && [ "${{ matrix.os }}" == "ubuntu-latest" ] && STACK_ARGS="$STACK_ARGS --system-ghc"
-        [ -n "${{ matrix.stack-yaml }}" ] && STACK_YAML=${{ matrix.stack-yaml }}
-        stack $STACK_ARGS runghc git-modtime.hs
-    - name: Tests
+        stack $STACK_ARGS test --no-run-tests --haddock --no-haddock-deps
+    - name: Test
       env:
-        COVERALLS_TOKEN: ${{ secrets.COVERALLS_TOKEN }}
+        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
       run: |
         set -ex
-        [ -n "${{ matrix.ghc }}" ] && [ "${{ matrix.os }}" == "ubuntu-latest" ] && STACK_ARGS="$STACK_ARGS --system-ghc"
-        [ -n "${{ matrix.stack-yaml }}" ] && STACK_YAML=${{ matrix.stack-yaml }}
-        if [ "${{ matrix.os }}.${{ matrix.resolver }}" == "ubuntu-latest.lts-14" ] && [ -n "${COVERALLS_TOKEN}" ]; then
-          stack $STACK_ARGS test Color:tests --coverage --haddock --no-haddock-deps
+        if [ "${{ matrix.os }}.${{ matrix.resolver }}" == "ubuntu-latest.lts-21" ] && [ -n "${COVERALLS_REPO_TOKEN}" ]; then
+          stack $STACK_ARGS test --coverage
           stack $STACK_ARGS hpc report --all
-          curl -L https://github.com/rubik/stack-hpc-coveralls/releases/download/v0.0.6.1/shc-linux-x64-8.8.4.tar.bz2 | tar xj shc
-          ./shc --repo-token="$COVERALLS_TOKEN" --partial-coverage --fetch-coverage combined custom
+          curl -L https://github.com/rubik/stack-hpc-coveralls/releases/download/v0.0.7.0/shc-Linux-X64.tar.bz2 | tar xj shc
+          ./shc --repo-token="$COVERALLS_REPO_TOKEN" --partial-coverage --fetch-coverage combined custom
         else
-          stack $STACK_ARGS test Color:tests Color:doctests --bench --no-run-benchmarks --haddock --no-haddock-deps
+          stack $STACK_ARGS test
         fi
+
+  test-with-cabal:
+    name: Cabal
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "8.0.2" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "8.2.2" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "8.4.4" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "8.6.5" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "8.8.4" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "8.10.7" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "9.0.2" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "9.2.8" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "9.4.8" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "9.6.6" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "9.8.2" }
+          - { cabal: "3.12", os: ubuntu-latest, ghc: "9.10.1" }
+          - { cabal: "3.12", os: windows-latest, ghc: "9.0.2" }
+          - { cabal: "3.12", os: windows-latest, ghc: "9.2.8" }
+          - { cabal: "3.12", os: windows-latest, ghc: "9.4.8" }
+          - { cabal: "3.12", os: windows-latest, ghc: "9.6.6" }
+          - { cabal: "3.12", os: windows-latest, ghc: "9.8.2" }
+          - { cabal: "3.12", os: windows-latest, ghc: "9.10.1" }
+          - { cabal: "3.12", os: macOS-13, ghc: "9.0.2" }
+          - { cabal: "3.12", os: macOS-latest, ghc: "9.2.8" }
+          - { cabal: "3.12", os: macOS-latest, ghc: "9.4.8" }
+          - { cabal: "3.12", os: macOS-latest, ghc: "9.6.6" }
+          - { cabal: "3.12", os: macOS-latest, ghc: "9.8.2" }
+          - { cabal: "3.12", os: macOS-latest, ghc: "9.10.1" }
+
+    env:
+      cache-version: v0 # bump up this version to invalidate currently stored cache
+    steps:
+    - uses: actions/checkout@v4
+    - uses: haskell-actions/setup@v2
+      id: setup-haskell-cabal
+      name: Setup Haskell
+      with:
+        ghc-version: ${{ matrix.ghc }}
+        cabal-version: ${{ matrix.cabal }}
+
+    - name: Cache Cabal Store
+      id: cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
+          dist-newstyle
+        key: cabal-${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-version }}
+        restore-keys: |
+          cabal-${{ runner.os }}-${{ matrix.ghc }}-${{ env.cache-version }}
+    - name: Build
+      run: |
+        set -ex
+        cabal configure --haddock-all --enable-tests --enable-benchmarks
+        cabal build all --write-ghc-environment-files=always
+    - name: Test
+      run: |
+        set -ex
+        cabal test all
+    - name: Doctest
+      # older ghc versions do not like some haddock examples
+      # linker on MacOS-13 complains too
+      # windows as always results in non-deterministic nonsense, so it will likely get disabled soon too.
+      # if: contains(fromJSON('["8.6.5", "8.8.4", "8.10.7", "9.0.2"]'), matrix.ghc) != true && matrix.os != 'macOS-13'
+      run: |
+        set -ex
+        cabal install doctest --ignore-project --overwrite-policy=always
+        cabal repl --build-depends=QuickCheck --with-compiler=doctest --repl-options='-w -Wdefault'
+    - name: Check Cabal Files
+      run: |
+        set -ex
+        cabal -vnormal check
diff --git a/stack-extra-deps.yaml b/stack.ghc-8.4.4.yaml
similarity index 98%
rename from stack-extra-deps.yaml
rename to stack.ghc-8.4.4.yaml
index d68fce7..5f1cb8d 100644
--- a/stack-extra-deps.yaml
+++ b/stack.ghc-8.4.4.yaml
@@ -1,4 +1,4 @@
-resolver: lts-13.30
+resolver: lts-12.26
 packages:
 - Color
 extra-deps:
diff --git a/stack.ghc-8.6.5.yaml b/stack.ghc-8.6.5.yaml
new file mode 100644
index 0000000..5f1cb8d
--- /dev/null
+++ b/stack.ghc-8.6.5.yaml
@@ -0,0 +1,15 @@
+resolver: lts-12.26
+packages:
+- Color
+extra-deps:
+- JuicyPixels-3.3.5@sha256:5c67dc066d67f5045221a8202f701f4c77eab8220f44414c00fadcdc3e4f872b,3911
+- QuickCheck-2.13.2@sha256:ad4e5adbd1c9dc0221a44307b992cb040c515f31095182e47aa7e974bc461df1,6952
+- splitmix-0.0.3@sha256:455de9326ae5bbe5492cbb140fefb04cf988501e25b204dabaf755ab67400d9d,4835
+- cabal-doctest-1.0.8@sha256:34dff6369d417df2699af4e15f06bc181d495eca9c51efde173deae2053c197c,1491
+- doctest-0.16.2@sha256:2f96e9bbe9aee11b47453c82c24b3dc76cdbb8a2a7c984dfd60b4906d08adf68,6942
+- hspec-core-2.7.1@sha256:2696420050bafb1b690366b2c0ca8595a27c4597811df036f0c35cf19f46862b,4583
+- hspec-2.7.1@sha256:0aa48928ce80a34f8ff8c5ef114bb6807edfb8d884bcd7211eceed710e7fb7a8,1769
+- hspec-discover-2.7.1@sha256:e8ce36741c06b41de58069814a7d3b7314bdeaab35ae573e3c924739011e0c29,2243
+- massiv-test-0.1.2@sha256:93df921acadb56f81b35d3117e020e485b3b26c28a99e2053544878c92de2fcb,3859
+- massiv-0.4.5.0@sha256:a0e16ef4503c642cff1bbf686f1c89e87ac3bb6755f4d975ff8b5b8fc27b61db,4611
+- scheduler-1.4.2.1@sha256:26fb16ccf5f41ee9144f8c77a5228163968543ae5cc8242c761e69ff8f579e07,2863
diff --git a/stack.ghc-8.8.4.yaml b/stack.ghc-8.8.4.yaml
new file mode 100644
index 0000000..5f1cb8d
--- /dev/null
+++ b/stack.ghc-8.8.4.yaml
@@ -0,0 +1,15 @@
+resolver: lts-12.26
+packages:
+- Color
+extra-deps:
+- JuicyPixels-3.3.5@sha256:5c67dc066d67f5045221a8202f701f4c77eab8220f44414c00fadcdc3e4f872b,3911
+- QuickCheck-2.13.2@sha256:ad4e5adbd1c9dc0221a44307b992cb040c515f31095182e47aa7e974bc461df1,6952
+- splitmix-0.0.3@sha256:455de9326ae5bbe5492cbb140fefb04cf988501e25b204dabaf755ab67400d9d,4835
+- cabal-doctest-1.0.8@sha256:34dff6369d417df2699af4e15f06bc181d495eca9c51efde173deae2053c197c,1491
+- doctest-0.16.2@sha256:2f96e9bbe9aee11b47453c82c24b3dc76cdbb8a2a7c984dfd60b4906d08adf68,6942
+- hspec-core-2.7.1@sha256:2696420050bafb1b690366b2c0ca8595a27c4597811df036f0c35cf19f46862b,4583
+- hspec-2.7.1@sha256:0aa48928ce80a34f8ff8c5ef114bb6807edfb8d884bcd7211eceed710e7fb7a8,1769
+- hspec-discover-2.7.1@sha256:e8ce36741c06b41de58069814a7d3b7314bdeaab35ae573e3c924739011e0c29,2243
+- massiv-test-0.1.2@sha256:93df921acadb56f81b35d3117e020e485b3b26c28a99e2053544878c92de2fcb,3859
+- massiv-0.4.5.0@sha256:a0e16ef4503c642cff1bbf686f1c89e87ac3bb6755f4d975ff8b5b8fc27b61db,4611
+- scheduler-1.4.2.1@sha256:26fb16ccf5f41ee9144f8c77a5228163968543ae5cc8242c761e69ff8f579e07,2863