diff --git a/.github/workflows/ci_linux.yml b/.github/workflows/ci_linux.yml
index 852ab2b2..85ccdfee 100644
--- a/.github/workflows/ci_linux.yml
+++ b/.github/workflows/ci_linux.yml
@@ -28,12 +28,6 @@ jobs:
       fail-fast: false
       matrix:
         variance:
-          - name: Ubuntu-22.04 / CUDA-12.8.1 / x86_64
-            image: "ghcr.io/rust-gpu/rust-cuda-ubuntu22-cuda12:latest"
-            runner: ubuntu-latest
-          - name: Ubuntu-22.04 / CUDA-12.8.1 / ARM64
-            image: "ghcr.io/rust-gpu/rust-cuda-ubuntu22-cuda12:latest"
-            runner: ubuntu-22.04-arm
           - name: Ubuntu-24.04 / CUDA-12.8.1 / x86_64
             image: "ghcr.io/rust-gpu/rust-cuda-ubuntu24-cuda12:latest"
             runner: ubuntu-latest
@@ -244,12 +238,6 @@ jobs:
       matrix:
         variance:
           # Must match the build job's matrix definition
-          - name: Ubuntu-22.04 / CUDA-12.8.1 / x86_64
-            image: "ghcr.io/rust-gpu/rust-cuda-ubuntu22-cuda12:latest"
-            runner: ubuntu-latest
-          - name: Ubuntu-22.04 / CUDA-12.8.1 / ARM64
-            image: "ghcr.io/rust-gpu/rust-cuda-ubuntu22-cuda12:latest"
-            runner: ubuntu-22.04-arm
           - name: Ubuntu-24.04 / CUDA-12.8.1 / x86_64
             image: "ghcr.io/rust-gpu/rust-cuda-ubuntu24-cuda12:latest"
             runner: ubuntu-latest
diff --git a/.github/workflows/container_images.yml b/.github/workflows/container_images.yml
index e3fcd8af..7485812e 100644
--- a/.github/workflows/container_images.yml
+++ b/.github/workflows/container_images.yml
@@ -30,9 +30,6 @@ jobs:
           - runner: ubuntu-24.04-arm
             arch: arm64
         variance:
-          - name: Ubuntu-22.04/CUDA-12.8.1
-            image: "rust-gpu/rust-cuda-ubuntu22-cuda12"
-            dockerfile: ./container/ubuntu22-cuda12/Dockerfile
           - name: Ubuntu-24.04/CUDA-12.8.1
             image: "rust-gpu/rust-cuda-ubuntu24-cuda12"
             dockerfile: ./container/ubuntu24-cuda12/Dockerfile
@@ -154,8 +151,6 @@ jobs:
       fail-fast: false
       matrix:
         variance:
-          - name: Ubuntu-22.04/CUDA-12.8.1
-            image: "rust-gpu/rust-cuda-ubuntu22-cuda12"
           - name: Ubuntu-24.04/CUDA-12.8.1
             image: "rust-gpu/rust-cuda-ubuntu24-cuda12"
           - name: RockyLinux-9/CUDA-12.8.1
diff --git a/container/ubuntu22-cuda12/Dockerfile b/container/ubuntu22-cuda12/Dockerfile
deleted file mode 100644
index d24bbebb..00000000
--- a/container/ubuntu22-cuda12/Dockerfile
+++ /dev/null
@@ -1,89 +0,0 @@
-FROM nvcr.io/nvidia/cuda:12.8.1-cudnn-devel-ubuntu22.04 AS llvm-builder
-
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -qq -y install \
-    build-essential \
-    clang \
-    curl \
-    libffi-dev \
-    libedit-dev \
-    libncurses5-dev \
-    libssl-dev \
-    libtinfo-dev \
-    libxml2-dev \
-    cmake \
-    ninja-build \
-    pkg-config \
-    python3 \
-    xz-utils \
-    zlib1g-dev && \
-    rm -rf /var/lib/apt/lists/*
-
-WORKDIR /data/llvm7
-
-# Download and build LLVM 7.1.0 for all architectures.
-RUN curl -sSf -L -O https://github.com/llvm/llvm-project/releases/download/llvmorg-7.1.0/llvm-7.1.0.src.tar.xz && \
-    tar -xf llvm-7.1.0.src.tar.xz && \
-    cd llvm-7.1.0.src && \
-    mkdir build && cd build && \
-    ARCH=$(dpkg --print-architecture) && \
-    if [ "$ARCH" = "amd64" ]; then \
-        TARGETS="X86;NVPTX"; \
-    else \
-        TARGETS="AArch64;NVPTX"; \
-    fi && \
-    cmake -G Ninja \
-        -DCMAKE_BUILD_TYPE=Release \
-        -DLLVM_TARGETS_TO_BUILD="$TARGETS" \
-        -DLLVM_BUILD_LLVM_DYLIB=ON \
-        -DLLVM_LINK_LLVM_DYLIB=ON \
-        -DLLVM_ENABLE_ASSERTIONS=OFF \
-        -DLLVM_ENABLE_BINDINGS=OFF \
-        -DLLVM_INCLUDE_EXAMPLES=OFF \
-        -DLLVM_INCLUDE_TESTS=OFF \
-        -DLLVM_INCLUDE_BENCHMARKS=OFF \
-        -DLLVM_ENABLE_ZLIB=ON \
-        -DLLVM_ENABLE_TERMINFO=ON \
-        -DCMAKE_INSTALL_PREFIX=/opt/llvm-7 \
-        .. && \
-    ninja -j$(nproc) && \
-    ninja install && \
-    cd ../.. && \
-    rm -rf llvm-7.1.0.src*
-
-FROM nvcr.io/nvidia/cuda:12.8.1-cudnn-devel-ubuntu22.04
-
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -qq -y install \
-    build-essential \
-    clang \
-    curl \
-    libssl-dev \
-    libtinfo-dev \
-    pkg-config \
-    xz-utils \
-    zlib1g-dev \
-    cmake \
-    libfontconfig-dev \
-    libx11-xcb-dev \
-    libxcursor-dev \
-    libxi-dev \
-    libxinerama-dev \
-    libxrandr-dev && \
-    rm -rf /var/lib/apt/lists/*
-
-COPY --from=llvm-builder /opt/llvm-7 /opt/llvm-7
-RUN ln -s /opt/llvm-7/bin/llvm-config /usr/bin/llvm-config && \
-    ln -s /opt/llvm-7/bin/llvm-config /usr/bin/llvm-config-7
-
-# Get Rust (install rustup; toolchain installed from rust-toolchain.toml below)
-RUN curl -sSf -L https://sh.rustup.rs | bash -s -- -y --profile minimal --default-toolchain none
-ENV PATH="/root/.cargo/bin:${PATH}"
-
-# Setup the workspace
-WORKDIR /data/rust-cuda
-RUN --mount=type=bind,source=rust-toolchain.toml,target=/data/rust-cuda/rust-toolchain.toml \
-    rustup show
-
-# Add nvvm to LD_LIBRARY_PATH.
-ENV LD_LIBRARY_PATH="/usr/local/cuda/nvvm/lib64:${LD_LIBRARY_PATH}"
-ENV LLVM_LINK_STATIC=1
-ENV RUST_LOG=info