diff --git a/.github/workflows/debian.yml b/.github/workflows/debian.yml
index 08fcc6b..1e0014c 100644
--- a/.github/workflows/debian.yml
+++ b/.github/workflows/debian.yml
@@ -5,7 +5,9 @@ on:
     branches:
       - master
     paths:
+      - '**/bullseye/Dockerfile'
       - '**/buster/Dockerfile'
+      - '**/slim-bullseye/Dockerfile'
       - '**/slim-buster/Dockerfile'
       - '.github/workflows/debian.yml'
 
@@ -35,6 +37,12 @@ jobs:
             ghc_minor: '9.10'
           - ghc: '9.8.2'
             ghc_minor: '9.8'
+          - ghc: '9.6.6'
+            ghc_minor: '9.6'
+            deb: 'slim-bullseye'
+          - ghc: '9.6.6'
+            ghc_minor: '9.6'
+            deb: 'bullseye'
           - ghc: '9.6.6'
             ghc_minor: '9.6'
           - ghc: '9.4.8'
@@ -74,6 +82,18 @@ jobs:
         deb: ['buster']
         arch: ['aarch64']
         include:
+          # bullseye (debian 11)
+          - ghc: '9.10.1'
+            ghc_minor: '9.10'
+            deb: 'bullseye'
+            arch: 'aarch64'
+            docker_platform: arm64
+          - ghc: '9.6.6'
+            ghc_minor: '9.6'
+            deb: 'bullseye'
+            arch: 'aarch64'
+            docker_platform: arm64
+          # buster (debian 10)
           - ghc: '9.10.1'
             ghc_minor: '9.10'
           - ghc: '9.8.2'
@@ -101,7 +121,7 @@ jobs:
             apt-get install -y curl
             curl -fsSL https://get.docker.com | sh
           run: |
-            docker build --pull \
+            docker build --pull --progress=plain \
               --platform "linux/${{ matrix.docker_platform }}" \
               -t haskell:${{ matrix.ghc }}-${{ matrix.deb }} \
               ${{ matrix.ghc_minor }}/${{ matrix.deb }}
diff --git a/9.6/bullseye/Dockerfile b/9.6/bullseye/Dockerfile
new file mode 100644
index 0000000..ffe069d
--- /dev/null
+++ b/9.6/bullseye/Dockerfile
@@ -0,0 +1,137 @@
+FROM debian:bullseye
+
+ENV LANG C.UTF-8
+
+# common haskell + stack dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        curl \
+        dpkg-dev \
+        git \
+        gcc \
+        gnupg \
+        g++ \
+        libc6-dev \
+        libffi-dev \
+        libgmp-dev \
+        libnuma-dev \
+        libtinfo-dev \
+        make \
+        netbase \
+        xz-utils \
+        zlib1g-dev && \
+    rm -rf /var/lib/apt/lists/*
+
+ARG STACK=2.15.5
+ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
+
+RUN set -eux; \
+    cd /tmp; \
+    ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_CPU)"; \
+    STACK_URL="https://github.com/commercialhaskell/stack/releases/download/v${STACK}/stack-${STACK}-linux-$ARCH.tar.gz"; \
+    # sha256 from https://github.com/commercialhaskell/stack/releases/download/v${STACK}/stack-${STACK}-linux-$ARCH.tar.gz.sha256
+    case "$ARCH" in \
+        'aarch64') \
+            STACK_SHA256='52cd9d9c2ee4dbf2841bba856f5fca15fbf6ba23fced7256aa3f7c8b76381c91'; \
+            ;; \
+        'x86_64') \
+            STACK_SHA256='d55f8554932aad23f7b1198e0d5ebe332073d73fe60e3f324d0b315c156d8c43'; \
+            ;; \
+        *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
+    esac; \
+    curl -sSL "$STACK_URL" -o stack.tar.gz; \
+    echo "$STACK_SHA256 stack.tar.gz" | sha256sum --strict --check; \
+    \
+    curl -sSL "$STACK_URL.asc" -o stack.tar.gz.asc; \
+    GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    gpg --batch --keyserver keyserver.ubuntu.com --receive-keys "$STACK_RELEASE_KEY"; \
+    gpg --batch --verify stack.tar.gz.asc stack.tar.gz; \
+    gpgconf --kill all; \
+    \
+    tar -xf stack.tar.gz -C /usr/local/bin --strip-components=1 "stack-$STACK-linux-$ARCH/stack"; \
+    stack config set system-ghc --global true; \
+    stack config set install-ghc --global false; \
+    \
+    rm -rf /tmp/*; \
+    \
+    stack --version;
+
+ARG CABAL_INSTALL=3.10.3.0
+ARG CABAL_INSTALL_RELEASE_KEY=EAF2A9A722C0C96F2B431CA511AAD8CEDEE0CAEF
+
+RUN set -eux; \
+    cd /tmp; \
+    ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_CPU)"; \
+    CABAL_INSTALL_TAR="cabal-install-$CABAL_INSTALL-$ARCH-linux-deb11.tar.xz"; \
+    CABAL_INSTALL_URL="https://downloads.haskell.org/~cabal/cabal-install-$CABAL_INSTALL/$CABAL_INSTALL_TAR"; \
+    CABAL_INSTALL_SHA256SUMS_URL="https://downloads.haskell.org/~cabal/cabal-install-$CABAL_INSTALL/SHA256SUMS"; \
+    # sha256 from https://downloads.haskell.org/~cabal/cabal-install-$CABAL_INSTALL/SHA256SUMS
+    case "$ARCH" in \
+        'aarch64') \
+            CABAL_INSTALL_SHA256='e0b6604d3596c5e5b7236e79ff4f5aa8af337792bf69ac4a90634c761f1b9ed5'; \
+            ;; \
+        'x86_64') \
+            CABAL_INSTALL_SHA256='12d018bdd07efed470f278f22d94b33655c4fcbc44d28d97b5ebb7944d5607c5'; \
+            ;; \
+        *) echo >&2 "error: unsupported architecture '$ARCH'"; exit 1 ;; \
+    esac; \
+    curl -fSL "$CABAL_INSTALL_URL" -o cabal-install.tar.gz; \
+    echo "$CABAL_INSTALL_SHA256 cabal-install.tar.gz" | sha256sum --strict --check; \
+    \
+    curl -sSLO "$CABAL_INSTALL_SHA256SUMS_URL"; \
+    curl -sSLO "$CABAL_INSTALL_SHA256SUMS_URL.sig"; \
+    GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    gpg --batch --keyserver keyserver.ubuntu.com --receive-keys "$CABAL_INSTALL_RELEASE_KEY"; \
+    gpg --batch --verify SHA256SUMS.sig SHA256SUMS; \
+    # confirm we are verifying SHA256SUMS that matches the release + sha256
+    grep "$CABAL_INSTALL_SHA256  $CABAL_INSTALL_TAR" SHA256SUMS; \
+    gpgconf --kill all; \
+    \
+    tar -xf cabal-install.tar.gz -C /usr/local/bin; \
+    \
+    rm -rf /tmp/*; \
+    \
+    cabal --version
+
+ARG GHC=9.6.6
+ARG GHC_RELEASE_KEY=88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4
+
+RUN set -eux; \
+    cd /tmp; \
+    ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_CPU)"; \
+    # sha256 from https://downloads.haskell.org/~ghc/$GHC/SHA256SUMS
+    case "$ARCH" in \
+        'aarch64') \
+            # Note: the 'aarch64-deb11' (bullseye) variant of images doesn't exist in https://downloads.haskell.org/~ghc/9.6.6/
+            # But deb10 (buster) images should be binary compatible with deb11, so using deb10 instead
+            GHC_URL="https://downloads.haskell.org/~ghc/$GHC/ghc-$GHC-$ARCH-deb10-linux.tar.xz"; \
+            GHC_SHA256='58d5ce65758ec5179b448e4e1a2f835924b4ada96cf56af80d011bed87d91fef'; \
+            ;; \
+        'x86_64') \
+            GHC_URL="https://downloads.haskell.org/~ghc/$GHC/ghc-$GHC-$ARCH-deb11-linux.tar.xz"; \
+            GHC_SHA256='a34bdfc1f65b000135d9c8eb12d69670026a64043a8b33ef5ba24b0f8e28d046'; \
+            ;; \
+        *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
+    esac; \
+    curl -sSL "$GHC_URL" -o ghc.tar.xz; \
+    echo "$GHC_SHA256 ghc.tar.xz" | sha256sum --strict --check; \
+    \
+    GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    curl -sSL "$GHC_URL.sig" -o ghc.tar.xz.sig; \
+    gpg --batch --keyserver keyserver.ubuntu.com --receive-keys "$GHC_RELEASE_KEY"; \
+    gpg --batch --verify ghc.tar.xz.sig ghc.tar.xz; \
+    gpgconf --kill all; \
+    \
+    tar xf ghc.tar.xz; \
+    cd "ghc-$GHC-$ARCH-unknown-linux"; \
+    ./configure --prefix "/opt/ghc/$GHC"; \
+    make install; \
+    \
+    rm -rf /tmp/*; \
+    \
+    "/opt/ghc/$GHC/bin/ghc" --version
+
+ENV PATH /root/.cabal/bin:/root/.local/bin:/opt/ghc/${GHC}/bin:$PATH
+
+CMD ["ghci"]
diff --git a/9.6/slim-bullseye/Dockerfile b/9.6/slim-bullseye/Dockerfile
new file mode 100644
index 0000000..837726b
--- /dev/null
+++ b/9.6/slim-bullseye/Dockerfile
@@ -0,0 +1,139 @@
+FROM debian:bullseye-slim
+
+ENV LANG C.UTF-8
+
+# common haskell + stack dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        curl \
+        dpkg-dev \
+        git \
+        gcc \
+        gnupg \
+        g++ \
+        libc6-dev \
+        libffi-dev \
+        libgmp-dev \
+        libnuma-dev \
+        libtinfo-dev \
+        make \
+        netbase \
+        xz-utils \
+        zlib1g-dev && \
+    rm -rf /var/lib/apt/lists/*
+
+ARG STACK=2.15.5
+ARG STACK_RELEASE_KEY=C5705533DA4F78D8664B5DC0575159689BEFB442
+
+RUN set -eux; \
+    cd /tmp; \
+    ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_CPU)"; \
+    STACK_URL="https://github.com/commercialhaskell/stack/releases/download/v${STACK}/stack-${STACK}-linux-$ARCH.tar.gz"; \
+    # sha256 from https://github.com/commercialhaskell/stack/releases/download/v${STACK}/stack-${STACK}-linux-$ARCH.tar.gz.sha256
+    case "$ARCH" in \
+        'aarch64') \
+            STACK_SHA256='52cd9d9c2ee4dbf2841bba856f5fca15fbf6ba23fced7256aa3f7c8b76381c91'; \
+            ;; \
+        'x86_64') \
+            STACK_SHA256='d55f8554932aad23f7b1198e0d5ebe332073d73fe60e3f324d0b315c156d8c43'; \
+            ;; \
+        *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
+    esac; \
+    curl -sSL "$STACK_URL" -o stack.tar.gz; \
+    echo "$STACK_SHA256 stack.tar.gz" | sha256sum --strict --check; \
+    \
+    curl -sSL "$STACK_URL.asc" -o stack.tar.gz.asc; \
+    GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    gpg --batch --keyserver keyserver.ubuntu.com --receive-keys "$STACK_RELEASE_KEY"; \
+    gpg --batch --verify stack.tar.gz.asc stack.tar.gz; \
+    gpgconf --kill all; \
+    \
+    tar -xf stack.tar.gz -C /usr/local/bin --strip-components=1 "stack-$STACK-linux-$ARCH/stack"; \
+    stack config set system-ghc --global true; \
+    stack config set install-ghc --global false; \
+    \
+    rm -rf /tmp/*; \
+    \
+    stack --version;
+
+ARG CABAL_INSTALL=3.10.3.0
+ARG CABAL_INSTALL_RELEASE_KEY=EAF2A9A722C0C96F2B431CA511AAD8CEDEE0CAEF
+
+RUN set -eux; \
+    cd /tmp; \
+    ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_CPU)"; \
+    CABAL_INSTALL_TAR="cabal-install-$CABAL_INSTALL-$ARCH-linux-deb11.tar.xz"; \
+    CABAL_INSTALL_URL="https://downloads.haskell.org/~cabal/cabal-install-$CABAL_INSTALL/$CABAL_INSTALL_TAR"; \
+    CABAL_INSTALL_SHA256SUMS_URL="https://downloads.haskell.org/~cabal/cabal-install-$CABAL_INSTALL/SHA256SUMS"; \
+    # sha256 from https://downloads.haskell.org/~cabal/cabal-install-$CABAL_INSTALL/SHA256SUMS
+    case "$ARCH" in \
+        'aarch64') \
+            CABAL_INSTALL_SHA256='e0b6604d3596c5e5b7236e79ff4f5aa8af337792bf69ac4a90634c761f1b9ed5'; \
+            ;; \
+        'x86_64') \
+            CABAL_INSTALL_SHA256='12d018bdd07efed470f278f22d94b33655c4fcbc44d28d97b5ebb7944d5607c5'; \
+            ;; \
+        *) echo >&2 "error: unsupported architecture '$ARCH'"; exit 1 ;; \
+    esac; \
+    curl -fSL "$CABAL_INSTALL_URL" -o cabal-install.tar.gz; \
+    echo "$CABAL_INSTALL_SHA256 cabal-install.tar.gz" | sha256sum --strict --check; \
+    \
+    curl -sSLO "$CABAL_INSTALL_SHA256SUMS_URL"; \
+    curl -sSLO "$CABAL_INSTALL_SHA256SUMS_URL.sig"; \
+    GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    gpg --batch --keyserver keyserver.ubuntu.com --receive-keys "$CABAL_INSTALL_RELEASE_KEY"; \
+    gpg --batch --verify SHA256SUMS.sig SHA256SUMS; \
+    # confirm we are verifying SHA256SUMS that matches the release + sha256
+    grep "$CABAL_INSTALL_SHA256  $CABAL_INSTALL_TAR" SHA256SUMS; \
+    gpgconf --kill all; \
+    \
+    tar -xf cabal-install.tar.gz -C /usr/local/bin; \
+    \
+    rm -rf /tmp/*; \
+    \
+    cabal --version
+
+ARG GHC=9.6.6
+ARG GHC_RELEASE_KEY=88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4
+
+RUN set -eux; \
+    cd /tmp; \
+    ARCH="$(dpkg-architecture --query DEB_BUILD_GNU_CPU)"; \
+    # sha256 from https://downloads.haskell.org/~ghc/$GHC/SHA256SUMS
+    case "$ARCH" in \
+        'aarch64') \
+            # Note: the 'aarch64-deb11' (bullseye) variant of images doesn't exist in https://downloads.haskell.org/~ghc/9.6.6/
+            # But deb10 (buster) images should be binary compatible with deb11, so using deb10 instead
+            GHC_URL="https://downloads.haskell.org/~ghc/$GHC/ghc-$GHC-$ARCH-deb10-linux.tar.xz"; \
+            GHC_SHA256='58d5ce65758ec5179b448e4e1a2f835924b4ada96cf56af80d011bed87d91fef'; \
+            ;; \
+        'x86_64') \
+            GHC_URL="https://downloads.haskell.org/~ghc/$GHC/ghc-$GHC-$ARCH-deb11-linux.tar.xz"; \
+            GHC_SHA256='a34bdfc1f65b000135d9c8eb12d69670026a64043a8b33ef5ba24b0f8e28d046'; \
+            ;; \
+        *) echo >&2 "error: unsupported architecture '$ARCH'" ; exit 1 ;; \
+    esac; \
+    curl -sSL "$GHC_URL" -o ghc.tar.xz; \
+    echo "$GHC_SHA256 ghc.tar.xz" | sha256sum --strict --check; \
+    \
+    GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
+    curl -sSL "$GHC_URL.sig" -o ghc.tar.xz.sig; \
+    gpg --batch --keyserver keyserver.ubuntu.com --receive-keys "$GHC_RELEASE_KEY"; \
+    gpg --batch --verify ghc.tar.xz.sig ghc.tar.xz; \
+    gpgconf --kill all; \
+    \
+    tar xf ghc.tar.xz; \
+    cd "ghc-$GHC-$ARCH-unknown-linux"; \
+    ./configure --prefix "/opt/ghc/$GHC"; \
+    make install; \
+    # remove profiling support to save space
+    find "/opt/ghc/$GHC/" \( -name "*_p.a" -o -name "*.p_hi" \) -type f -delete; \
+    \
+    rm -rf /tmp/*; \
+    \
+    "/opt/ghc/$GHC/bin/ghc" --version
+
+ENV PATH /root/.cabal/bin:/root/.local/bin:/opt/ghc/${GHC}/bin:$PATH
+
+CMD ["ghci"]