diff --git a/.github/workflows/setup.yml b/.github/workflows/setup.yml
deleted file mode 100644
index b7c7ce8..0000000
--- a/.github/workflows/setup.yml
+++ /dev/null
@@ -1,111 +0,0 @@
-name: SETUP
-
-on:
-  push:
-    tags:
-      - 'v*'
-  workflow_dispatch:
-
-env:
-  GIT_HTTPS: "true"
-
-jobs:
-  MEPHIT:
-    name: Build and test
-    runs-on: ubuntu-24.04
-
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Install dependencies
-        run: |
-          sudo apt-get update -y && sudo apt-get install -y -q --no-install-recommends \
-            apt-transport-https \
-            build-essential \
-            ca-certificates \
-            curl \
-            libssl-dev \
-            openssh-client \
-            rsync \
-            wget \
-            git \
-            gfortran \
-            ninja-build \
-            cmake \
-            python3 \
-            python3-dev \
-            python3-pip \
-            python3-venv
-
-          sudo apt-get install -y -q --no-install-recommends \
-            procps \
-            nano \
-            vim \
-            htop \
-            ncdu \
-            less \
-            gdb \
-            cmake-curses-gui \
-            valgrind \
-            dbus-x11 \
-            kcachegrind \
-            python3-tk \
-            idle3 \
-            findent \
-            expect \
-            environment-modules
-
-          sudo apt-get install -y -q --no-install-recommends \
-            pkg-config \
-            libsuitesparse-dev \
-            libopenblas-dev \
-            libsuperlu-dev \
-            libhdf5-dev \
-            libhdf5-openmpi-dev \
-            libnetcdf-dev \
-            libnetcdff-dev \
-            libfftw3-dev \
-            libgsl-dev \
-            libopenmpi-dev \
-            libscalapack-openmpi-dev \
-            libpcre3-dev \
-            libreadline-dev \
-            h5utils \
-            hdf5-tools \
-            netcdf-bin \
-            libmetis-dev \
-            libboost-all-dev
-
-      - name: Setup
-        run: |
-          set -e
-          source scripts/setup.sh
-          pushd external
-            ../scripts/setup/mfem.sh
-          popd
-
-      - name: Build tarball
-        run: |
-          set -e
-          tar -czf /tmp/code.tar.gz .
-
-      - name: Create GitHub Release
-        id: create_release
-        uses: actions/create-release@v1
-        with:
-          tag_name: ${{ github.ref_name }}
-          release_name: "Release ${{ github.ref_name }}"
-          draft: false
-          prerelease: false
-        env:
-          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
-
-      - name: Upload Tarball to Release
-        uses: actions/upload-release-asset@v1
-        with:
-          upload_url: ${{ steps.create_release.outputs.upload_url }}
-          asset_path: /tmp/code.tar.gz
-          asset_name: code-${{ github.ref_name }}.tar.gz
-          asset_content_type: application/gzip
-        env:
-          GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
diff --git a/README.md b/README.md
index 4669b05..8c5bb6a 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,11 @@ script into bashrc with
 
     echo "source $PWD/activate.sh" >> ~/.bashrc
 
+A `v*` tag produces a source-only Release: GitHub attaches a source archive
+and there is no prebuilt-dependency download. Fresh setups run
+`scripts/setup.sh`; the fastest path is the devcontainer image in
+`.devcontainer/`.
+
 ## External codes
 
 ### Intel compiler for codes GPEC and MARS