diff --git a/.github/workflows/common.yml b/.github/workflows/common.yml
index 7c1fd67..a0c1fac 100644
--- a/.github/workflows/common.yml
+++ b/.github/workflows/common.yml
@@ -7,15 +7,6 @@ on:
         required: true
         type: string
 
-env:
-  BUILD_DIR: ${{ github.workspace }}/build
-  INSTALL_DIR: ${{ github.workspace }}/dependencies
-
-  CCACHE_DIR: ${{ github.workspace }}/ccache
-  CCACHE_MAXSIZE: 10G
-
-  CXX_STANDARD: "20"
-
 jobs:
 
   build:
@@ -23,105 +14,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install dependencies
-        run: ./dependencies.sh
-
-      - name: Cache build
-        uses: actions/cache@v4
-        with:
-          path: ${{ env.CCACHE_DIR }}
-          key: ccache-${{ runner.os }}-${{ github.job }}
-
-      - name: Initial configure
-        run: >
-          cmake -S ${{ github.workspace }} 
-          -B ${{ env.BUILD_DIR }} 
-          -DCMAKE_INSTALL_PREFIX=${{ env.INSTALL_DIR }} 
-          -DCMAKE_BUILD_PARALLEL_LEVEL=3
-          -DCMAKE_CXX_STANDARD=${{ env.CXX_STANDARD }}
-
-
-      - name: Build
-        run: > 
-          cmake --build ${BUILD_DIR}
-
-      - name: Remove .pyc files and tests from install directory
-        run: |
-          find ${INSTALL_DIR} -type f -name *.pyc -delete
-          rm -rf ${INSTALL_DIR}/python/3.12.2/lib/python3.12/test
-
-      - name: Package build
-        run: |
-          tar czf install.tar.gz -C ${INSTALL_DIR} .
-
-      - uses: actions/upload-artifact@v4
-        with:
-          name: install_${{ inputs.os }}
-          path: |
-            install.tar.gz
-
-  make_tarball:
-    runs-on: ubuntu-latest # we don't need macOS here
-    needs: [build]
-    steps:
-      - uses: actions/download-artifact@v4
-        with:
-          name: install_${{ inputs.os }}
-          path: .
-
-      - name: Unpack full bundle
-        run: |
-          mkdir -p ${INSTALL_DIR}
-          tar xf install.tar.gz -C ${INSTALL_DIR}
-          rm install.tar.gz
-
-      - name: Package merged directory
-        run: |
-          tar cf - -C ${INSTALL_DIR} . | zstd -o install.tar.zst -19 -T$(nproc)
-
-      - name: Upload merged install directory
-        uses: actions/upload-artifact@v4
-        with:
-          name: deps_${{ inputs.os }}
-          path: |
-            install.tar.zst
-
-  deploy_to_eos:
-    if: github.ref == 'refs/heads/main' || startsWith(github.event.ref, 'refs/tags/v')
-    runs-on: ubuntu-latest # we don't need macOS here
-    needs:
-      - make_tarball
-    env: 
-      DEPLOY_USER: ${{ secrets.DEPLOY_USER }}
-      DEPLOY_PWD: ${{ secrets.DEPLOY_PWD }}
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install prerequisites
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y krb5-user krb5-config
-
-      - uses: actions/download-artifact@v4
-        with:
-          name: deps_${{ inputs.os }}
-          path: .
-
-      - name: Upload
-        run: |
-          echo "$DEPLOY_PWD" | kinit $DEPLOY_USER@CERN.CH 2>&1 >/dev/null
-          sha=$(echo $GITHUB_SHA | head -c 7)
-          name=deps.$sha.tar.zst
-          echo $name
-          echo $sha
-          mv install.tar.zst $name
-          scp -F ssh_config $name $DEPLOY_USER@lxplus.cern.ch:/eos/user/a/atsjenkins/www/ACTS/ci/${{ inputs.os }}/$name
-          ssh -F ssh_config $DEPLOY_USER@lxplus.cern.ch ln -f -s $name /eos/user/a/atsjenkins/www/ACTS/ci/${{ inputs.os }}/deps.latest.tar.zst
+      - name: Set up Spack
+        uses: spack/setup-spack@v2
 
-      - name: Symlink tag
-        if: startsWith(github.event.ref, 'refs/tags/v')
-        run: |
-          echo "$DEPLOY_PWD" | kinit $DEPLOY_USER@CERN.CH 2>&1 >/dev/null
-          sha=$(echo $GITHUB_SHA | head -c 7)
-          name=deps.$sha.tar.zst
-          ssh -F ssh_config $DEPLOY_USER@lxplus.cern.ch ln -f -s $name /eos/user/a/atsjenkins/www/ACTS/ci/${{ inputs.os }}/deps.${{ github.ref_name }}.tar.zst
+      - run: |
+          sudo mkdir -p /opt/spack /opt/view
+          sudo chown $USER /opt/spack
+          sudo chown $USER /opt/view
+      - run: spack -e . install --no-check-signature
diff --git a/spack.yaml b/spack.yaml
new file mode 100644
index 0000000..d7c7a23
--- /dev/null
+++ b/spack.yaml
@@ -0,0 +1,22 @@
+spack:
+  view: /opt/view
+  specs:
+    - boost@1.85.0
+    - cmake@3.30.1
+    - edm4hep@0.10.5
+    - eigen@3.4.0
+    - git-lfs@3.5.1
+    - intel-tbb@2021.12.0
+    - nlohmann-json@3.11.3
+    - podio@1.0.1
+    - root@6.32.02~opengl
+
+  config:
+    install_tree:
+      root: /opt/spack
+      padded_length: 128
+
+  mirrors:
+    local-buildcache:
+      url: oci://ghcr.io/acts-project/spack-buildcache
+      signed: false