diff --git a/.github/workflows/build-user-config.yml b/.github/workflows/build-user-config.yml
new file mode 100644
index 0000000..2576c44
--- /dev/null
+++ b/.github/workflows/build-user-config.yml
@@ -0,0 +1,179 @@
+name: Reusable user config build
+
+on:
+  workflow_call:
+    inputs:
+      build_matrix_path:
+        description: "Path to the build matrix file"
+        default: "build.yaml"
+        required: false
+        type: string
+      config_path:
+        description: "Path to the config directory"
+        default: "config"
+        required: false
+        type: string
+      fallback_binary:
+        description: "Fallback binary format, if no *.uf2 file was built"
+        default: "bin"
+        required: false
+        type: string
+      archive_name:
+        description: "Archive output file name"
+        default: "firmware"
+        required: false
+        type: string
+
+jobs:
+  matrix:
+    runs-on: ubuntu-latest
+    name: Fetch Build Keyboards
+    outputs:
+      build_matrix: ${{ env.build_matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install yaml2json
+        run: python3 -m pip install remarshal
+
+      - name: Fetch Build Matrix
+        run: |
+          echo "build_matrix=$(yaml2json '${{ inputs.build_matrix_path }}' | jq -c .)" >> $GITHUB_ENV
+          yaml2json "${{ inputs.build_matrix_path }}" | jq
+
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: zmkfirmware/zmk-dev-arm:3.5-branch
+    needs: matrix
+    name: Build
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJson(needs.matrix.outputs.build_matrix) }}
+    steps:
+      - name: Install adafruit-nrfutil
+        run: python3 -m pip install adafruit-nrfutil
+
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Create build directory
+        run: |
+          echo "build_dir=$(mktemp -d)" >> $GITHUB_ENV
+
+      - name: Prepare variables
+        shell: sh -x {0}
+        env:
+          board: ${{ matrix.board }}
+          shield: ${{ matrix.shield }}
+          artifact_name: ${{ matrix.artifact-name }}
+        run: |
+          if [ -e zephyr/module.yml ]; then
+            export zmk_load_arg=" -DZMK_EXTRA_MODULES='${GITHUB_WORKSPACE}'"
+            export new_tmp_dir=$(mktemp -d)
+            echo "base_dir=${new_tmp_dir}" >> $GITHUB_ENV
+          else
+            echo "base_dir=${GITHUB_WORKSPACE}" >> $GITHUB_ENV
+          fi
+
+          echo "zephyr_version=${ZEPHYR_VERSION}" >> $GITHUB_ENV
+          echo "extra_cmake_args=${shield:+-DSHIELD=\"$shield\"}${zmk_load_arg}" >> $GITHUB_ENV
+          echo "display_name=${shield:+$shield - }${board}" >> $GITHUB_ENV
+          echo "artifact_name=${artifact_name:-${shield:+$shield-}${board}-zmk}" >> $GITHUB_ENV
+
+      - name: Copy config files to isolated temporary directory
+        run: |
+          if [ "${{ env.base_dir }}" != "${GITHUB_WORKSPACE}" ]; then
+            mkdir "${{ env.base_dir }}/${{ inputs.config_path }}"
+            cp -R ${{ inputs.config_path }}/* "${{ env.base_dir }}/${{ inputs.config_path }}/"
+          fi
+
+      - name: Cache west modules
+        uses: actions/cache@v3.0.11
+        continue-on-error: true
+        env:
+          cache_name: cache-zephyr-${{ env.zephyr_version }}-modules
+        with:
+          path: |
+            ${{ env.base_dir }}/modules/
+            ${{ env.base_dir }}/tools/
+            ${{ env.base_dir }}/zephyr/
+            ${{ env.base_dir }}/bootloader/
+            ${{ env.base_dir }}/zmk/
+          key: ${{ runner.os }}-build-${{ env.cache_name }}-${{ hashFiles('**/west.yml', '**/build.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache_name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+
+      - name: West Init
+        working-directory: ${{ env.base_dir }}
+        run: west init -l "${{ env.base_dir }}/${{ inputs.config_path }}"
+
+      - name: West Update
+        working-directory: ${{ env.base_dir }}
+        run: west update
+
+      - name: West Zephyr export
+        working-directory: ${{ env.base_dir }}
+        run: west zephyr-export
+
+      - name: West Build (${{ env.display_name }})
+        working-directory: ${{ env.base_dir }}
+        shell: sh -x {0}
+        run: west build -s zmk/app -d "${{ env.build_dir }}" -b "${{ matrix.board }}" -- -DZMK_CONFIG=${{ env.base_dir }}/${{ inputs.config_path }} ${{ env.extra_cmake_args }} ${{ matrix.cmake-args }}
+
+      - name: Build DFU package
+        run: adafruit-nrfutil dfu genpkg --dev-type 0x0052 --application "${{ env.build_dir }}/zephyr/zmk.hex" "${{ env.build_dir }}/zephyr/dfu-package.zip"
+
+      - name: ${{ env.display_name }} Kconfig file
+        run: |
+          if [ -f "${{ env.build_dir }}/zephyr/.config" ]
+          then
+            grep -v -e "^#" -e "^$" "${{ env.build_dir }}/zephyr/.config" | sort
+          else
+            echo "No Kconfig output"
+          fi
+        if: ${{ !cancelled() }}
+
+      - name: ${{ env.display_name }} Devicetree file
+        run: |
+          if [ -f "${{ env.build_dir }}/zephyr/zephyr.dts" ]
+          then
+            cat "${{ env.build_dir }}/zephyr/zephyr.dts"
+          elif [ -f "${{ env.build_dir }}/zephyr/zephyr.dts.pre" ]
+          then
+            cat -s "${{ env.build_dir }}/zephyr/zephyr.dts.pre"
+          else
+            echo "No Devicetree output"
+          fi
+        if: ${{ !cancelled() }}
+
+      - name: Rename artifacts
+        shell: sh -x {0}
+        run: |
+          mkdir "${{ env.build_dir }}/artifacts"
+          if [ -f "${{ env.build_dir }}/zephyr/zmk.uf2" ]
+          then
+            cp "${{ env.build_dir }}/zephyr/zmk.uf2" "${{ env.build_dir }}/artifacts/${{ env.artifact_name }}.uf2"
+          elif [ -f "${{ env.build_dir }}/zephyr/zmk.${{ inputs.fallback_binary }}" ]
+          then
+            cp "${{ env.build_dir }}/zephyr/zmk.${{ inputs.fallback_binary }}" "${{ env.build_dir }}/artifacts/${{ env.artifact_name }}.${{ inputs.fallback_binary }}"
+          fi
+
+          if [ -f "${{ env.build_dir }}/zephyr/zmk.hex" ]
+          then
+            cp "${{ env.build_dir }}/zephyr/zmk.hex" "${{ env.build_dir }}/artifacts/${{ env.artifact_name }}.hex"
+          fi
+
+          if [ -f "${{ env.build_dir }}/zephyr/dfu-package.zip" ]
+          then
+            cp "${{ env.build_dir }}/zephyr/dfu-package.zip" "${{ env.build_dir }}/artifacts/${{ env.artifact_name }}-dfu.zip"
+          fi
+
+      - name: Archive (${{ env.display_name }})
+        uses: actions/upload-artifact@v3
+        with:
+          name: ${{ inputs.archive_name }}
+          path: ${{ env.build_dir }}/artifacts
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d74fb89..21b9ef6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -2,4 +2,4 @@ on: [push, pull_request, workflow_dispatch]
 
 jobs:
   build:
-    uses: zmkfirmware/zmk/.github/workflows/build-user-config.yml@main
+    uses: ./.github/workflows/build-user-config.yml