diff --git a/.github/workflows/gcc-c++23-armhf.yml b/.github/workflows/gcc-c++23-armhf.yml
index 2ef8ab7f..1bd2912b 100644
--- a/.github/workflows/gcc-c++23-armhf.yml
+++ b/.github/workflows/gcc-c++23-armhf.yml
@@ -11,39 +11,19 @@ jobs:
   build-gcc-cpp23-linux-no-stl-armhf:
     name: GCC C++23 Linux - No STL - armhf
     runs-on: ubuntu-24.04
-    container:
-      image: debian:trixie
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Install dependencies
-      run: |
-        dpkg --add-architecture armhf
-        apt-get update
-        apt-get install -y \
-          binfmt-support \
-          build-essential \
-          cmake \
-          make \
-          ninja-build \
-          git \
-          wget \
-          file \
-          gcc-arm-linux-gnueabihf \
-          g++-arm-linux-gnueabihf \
-          libc6:armhf \
-          libstdc++6:armhf \
-          qemu-user-static \
-          qemu-user
+    - name: Build Docker image
+      run: docker build -t etl-armhf -f .devcontainer/armhf/Dockerfile .
 
-    - name: Build
+    - name: Build and run tests
       run: |
-        cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
-         -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/armhf/toolchain-armhf.cmake \
-         -DEXTRA_TESTING_FLAGS=-v \
-         ./
-        cmake --build . -- -j "$(getconf _NPROCESSORS_ONLN)"
-
-    - name: Run tests
-      run: ctest -V
+        docker run --rm --user root -v ${{ github.workspace }}:/workspaces/etl etl-armhf bash -c "\
+          cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
+           -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/armhf/toolchain-armhf.cmake \
+           -DEXTRA_TESTING_FLAGS=-v \
+           ./ && \
+          cmake --build . -- -j \$(getconf _NPROCESSORS_ONLN) && \
+          ctest -V"
diff --git a/.github/workflows/gcc-c++23-i386.yml b/.github/workflows/gcc-c++23-i386.yml
index be1a7503..31bfc331 100644
--- a/.github/workflows/gcc-c++23-i386.yml
+++ b/.github/workflows/gcc-c++23-i386.yml
@@ -11,39 +11,19 @@ jobs:
   build-gcc-cpp23-linux-no-stl-i386:
     name: GCC C++23 Linux - No STL - i386
     runs-on: ubuntu-24.04
-    container:
-      image: debian:trixie
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Install dependencies
-      run: |
-        dpkg --add-architecture i386
-        apt-get update
-        apt-get install -y \
-          binfmt-support \
-          build-essential \
-          cmake \
-          make \
-          ninja-build \
-          git \
-          wget \
-          file \
-          gcc-i686-linux-gnu \
-          g++-i686-linux-gnu \
-          libc6:i386 \
-          libstdc++6:i386 \
-          qemu-user-static \
-          qemu-user
+    - name: Build Docker image
+      run: docker build -t etl-i386 -f .devcontainer/i386/Dockerfile .
 
-    - name: Build
+    - name: Build and run tests
       run: |
-        cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
-         -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/i386/toolchain-i386.cmake \
-         -DEXTRA_TESTING_FLAGS=-v \
-         ./
-        cmake --build . -- -j "$(getconf _NPROCESSORS_ONLN)"
-
-    - name: Run tests
-      run: ctest -V
+        docker run --rm --user root -v ${{ github.workspace }}:/workspaces/etl etl-i386 bash -c "\
+          cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
+           -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/i386/toolchain-i386.cmake \
+           -DEXTRA_TESTING_FLAGS=-v \
+           ./ && \
+          cmake --build . -- -j \$(getconf _NPROCESSORS_ONLN) && \
+          ctest -V"
diff --git a/.github/workflows/gcc-c++23-powerpc.yml b/.github/workflows/gcc-c++23-powerpc.yml
index 8c514e80..7494ae55 100644
--- a/.github/workflows/gcc-c++23-powerpc.yml
+++ b/.github/workflows/gcc-c++23-powerpc.yml
@@ -11,62 +11,19 @@ jobs:
   build-gcc-cpp23-linux-no-stl-powerpc:
     name: GCC C++23 Linux - No STL - powerpc
     runs-on: ubuntu-24.04
-    container:
-      image: debian:sid-20260406
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Install base dependencies
-      env:
-        DEBIAN_FRONTEND: noninteractive
-      run: |
-        dpkg --add-architecture powerpc
-        apt-get update
-        apt-get install -y --no-install-recommends \
-          binfmt-support \
-          gpg \
-          ca-certificates \
-          cmake \
-          make \
-          ninja-build \
-          git \
-          wget \
-          file \
-          debian-ports-archive-keyring
+    - name: Build Docker image
+      run: docker build -t etl-powerpc -f .devcontainer/powerpc/Dockerfile .
 
-    - name: Configure powerpc apt sources
+    - name: Build and run tests
       run: |
-        printf '%s\n' \
-          'Types: deb' \
-          'URIs: http://snapshot.debian.org/archive/debian-ports/20260406T000000Z' \
-          'Suites: sid' \
-          'Components: main' \
-          'Architectures: powerpc' \
-          'Signed-By: /usr/share/keyrings/debian-ports-archive-keyring.gpg' \
-          > /etc/apt/sources.list.d/powerpc.sources
-        echo 'Acquire::Check-Valid-Until "false";' > /etc/apt/apt.conf.d/99no-check-valid
-
-    - name: Install cross-compilation tools
-      env:
-        DEBIAN_FRONTEND: noninteractive
-      run: |
-        apt-get update
-        apt-get install -y --no-install-recommends \
-          qemu-user-static \
-          qemu-user \
-          gcc-powerpc-linux-gnu \
-          g++-powerpc-linux-gnu \
-          libc6:powerpc \
-          libstdc++6:powerpc
-
-    - name: Build
-      run: |
-        cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
-         -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/powerpc/toolchain-powerpc.cmake \
-         -DEXTRA_TESTING_FLAGS=-v \
-         ./
-        cmake --build . -- -j "$(getconf _NPROCESSORS_ONLN)"
-
-    - name: Run tests
-      run: ctest -V
+        docker run --rm --user root -v ${{ github.workspace }}:/workspaces/etl etl-powerpc bash -c "\
+          cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
+           -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/powerpc/toolchain-powerpc.cmake \
+           -DEXTRA_TESTING_FLAGS=-v \
+           ./ && \
+          cmake --build . -- -j \$(getconf _NPROCESSORS_ONLN) && \
+          ctest -V"
diff --git a/.github/workflows/gcc-c++23-riscv64.yml b/.github/workflows/gcc-c++23-riscv64.yml
index 61f298c6..695056a8 100644
--- a/.github/workflows/gcc-c++23-riscv64.yml
+++ b/.github/workflows/gcc-c++23-riscv64.yml
@@ -11,39 +11,19 @@ jobs:
   build-gcc-cpp23-linux-no-stl-riscv64:
     name: GCC C++23 Linux - No STL - riscv64
     runs-on: ubuntu-24.04
-    container:
-      image: debian:trixie
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Install dependencies
-      run: |
-        dpkg --add-architecture riscv64
-        apt-get update
-        apt-get install -y \
-          binfmt-support \
-          build-essential \
-          cmake \
-          make \
-          ninja-build \
-          git \
-          wget \
-          file \
-          gcc-riscv64-linux-gnu \
-          g++-riscv64-linux-gnu \
-          libc6:riscv64 \
-          libstdc++6:riscv64 \
-          qemu-user-static \
-          qemu-user
+    - name: Build Docker image
+      run: docker build -t etl-riscv64 -f .devcontainer/riscv64/Dockerfile .
 
-    - name: Build
+    - name: Build and run tests
       run: |
-        cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
-         -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/riscv64/toolchain-riscv64.cmake \
-         -DEXTRA_TESTING_FLAGS=-v \
-         ./
-        cmake --build . -- -j "$(getconf _NPROCESSORS_ONLN)"
-
-    - name: Run tests
-      run: ctest -V
+        docker run --rm --user root -v ${{ github.workspace }}:/workspaces/etl etl-riscv64 bash -c "\
+          cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
+           -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/riscv64/toolchain-riscv64.cmake \
+           -DEXTRA_TESTING_FLAGS=-v \
+           ./ && \
+          cmake --build . -- -j \$(getconf _NPROCESSORS_ONLN) && \
+          ctest -V"
diff --git a/.github/workflows/gcc-c++23-s390x.yml b/.github/workflows/gcc-c++23-s390x.yml
index e68dd388..f6a15aca 100644
--- a/.github/workflows/gcc-c++23-s390x.yml
+++ b/.github/workflows/gcc-c++23-s390x.yml
@@ -11,39 +11,19 @@ jobs:
   build-gcc-cpp23-linux-no-stl-s390x:
     name: GCC C++23 Linux - No STL - s390x
     runs-on: ubuntu-24.04
-    container:
-      image: debian:trixie
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Install dependencies
-      run: |
-        dpkg --add-architecture s390x
-        apt-get update
-        apt-get install -y \
-          binfmt-support \
-          build-essential \
-          cmake \
-          make \
-          ninja-build \
-          git \
-          wget \
-          file \
-          gcc-s390x-linux-gnu \
-          g++-s390x-linux-gnu \
-          libc6:s390x \
-          libstdc++6:s390x \
-          qemu-user-static \
-          qemu-user
+    - name: Build Docker image
+      run: docker build -t etl-s390x -f .devcontainer/s390x/Dockerfile .
 
-    - name: Build
+    - name: Build and run tests
       run: |
-        cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
-         -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/s390x/toolchain-s390x.cmake \
-         -DEXTRA_TESTING_FLAGS=-v \
-         ./
-        cmake --build . -- -j "$(getconf _NPROCESSORS_ONLN)"
-
-    - name: Run tests
-      run: ctest -V
+        docker run --rm --user root -v ${{ github.workspace }}:/workspaces/etl etl-s390x bash -c "\
+          cmake -DBUILD_TESTS=ON -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF \
+           -DETL_CXX_STANDARD=23 -DCMAKE_TOOLCHAIN_FILE=.devcontainer/s390x/toolchain-s390x.cmake \
+           -DEXTRA_TESTING_FLAGS=-v \
+           ./ && \
+          cmake --build . -- -j \$(getconf _NPROCESSORS_ONLN) && \
+          ctest -V"