diff --git a/.github/workflows/test-build.yml b/.github/workflows/_build.yml
similarity index 58%
rename from .github/workflows/test-build.yml
rename to .github/workflows/_build.yml
index e8e723b..75a1e10 100644
--- a/.github/workflows/test-build.yml
+++ b/.github/workflows/_build.yml
@@ -1,117 +1,138 @@
 ---
-name: Test Build
+# Requires _prepare.yml re-usable workflow to have run.
+name: Build for macOS
 on:
-  workflow_dispatch:
+  workflow_call:
     inputs:
-      gitRef:
-        description: "Emacs git ref to build"
+      artifact_prefix:
+        description: Artifact prefix
+        type: string
+        required: false
+      os:
+        description: GitHub Actions runner OS
+        type: string
         required: true
-        default: "master"
-      emacsBuilderGitRef:
-        description: "Git ref to checkout of build-emacs-for-macos"
+      git_ref:
+        description: Git ref to build
+        type: string
         required: true
-        default: "master"
-      testBuildName:
+      git_sha:
+        description: Override git SHA to build
+        type: string
+        required: false
+      test_build_name:
         description: "Test build name"
-        required: true
-      testReleaseType:
+        type: string
+        required: false
+      test_release_type:
         description: "prerelease or draft"
-        required: true
+        type: string
+        required: false
         default: "prerelease"
-      extraPlanArgs:
-        description: "Extra plan args"
-        required: false
-        default: ""
-      extraCheckArgs:
-        description: "Extra check args"
-        required: false
-        default: ""
-      extraBuildArgs:
-        description: "Extra build args"
-        required: false
-        default: "--native-full-aot --no-relink-eln-files"
-      extraPackageArgs:
-        description: "Extra package args"
-        required: false
-        default: ""
-      extraReleaseArgs:
-        description: "Extra release args"
-        required: false
-        default: ""
+    secrets:
+      APPLE_DEVELOPER_CERTIFICATE_P12_BASE64:
+        description: Base64 encoded Apple Developer Certificate
+        required: true
+      APPLE_DEVELOPER_CERTIFICATE_PASSWORD:
+        description: Password for Apple Developer Certificate
+        required: true
+      KEYCHAIN_PASSWORD:
+        description: Password to use for temporary local keychain on runner
+        required: true
+      AC_USERNAME:
+        description: Apple Connect Username
+        required: true
+      AC_PASSWORD:
+        description: Apple Connect Password
+        required: true
+      AC_PROVIDER:
+        description: Apple Connect Provider
+        required: true
+      AC_SIGN_IDENTITY:
+        description: Apple Connect Signing Identify
+        required: true
+      TAP_REPO_TOKEN:
+        description: Homebrew Tap Token
+        required: true
 
 jobs:
-  plan:
-    runs-on: macos-10.15
+  prepare:
+    runs-on: ${{ inputs.os }}
     outputs:
-      check: ${{ steps.check.outcome }}
       builder_sha: ${{ steps.builder_sha.outputs.sha }}
+      emacs_sha_override: ${{ steps.emacs_sha.outputs.sha }}
+      test_plan_args: ${{ steps.test_plan_args.outputs.args }}
     steps:
-      - name: Checkout build-emacs-for-macos repo
-        uses: actions/checkout@v2
+      - name: Download emacs-builder git SHA artifact
+        uses: actions/download-artifact@v2
         with:
-          repository: jimeh/build-emacs-for-macos
-          ref: ${{ github.event.inputs.emacsBuilderGitRef }}
-          path: builder
+          name: emacs-builder-git-sha
+          path: ./
       - name: Store builder Git SHA
         id: builder_sha
-        run: echo "::set-output name=sha::$(git rev-parse HEAD)"
-        working-directory: builder
-      - uses: actions/setup-go@v2
+        run: >-
+          echo "::set-output name=sha::$(cat emacs-builder-git-sha.txt)"
+      - name: Prepare plan test args
+        id: test_plan_args
+        if: ${{ inputs.test_build_name != '' }}
+        run: >-
+          echo "::set-output name=args::--test-build '${{ inputs.test_build_name }}' --test-release-type '${{ inputs.test_release_type }}'"
+      - name: Set git SHA override
+        id: emacs_sha
+        if: ${{ inputs.git_sha != '' }}
+        run: >-
+          echo "::set-output name=sha::--sha '${{ inputs.git_sha }}'"
+
+  plan:
+    needs: [prepare]
+    runs-on: ${{ inputs.os }}
+    outputs:
+      check: ${{ steps.check.outputs.result }}
+    steps:
+      - name: Download pre-built emacs-builder artifact
+        uses: actions/download-artifact@v2
         with:
-          go-version: 1.16
-      - uses: actions/cache@v2
-        with:
-          path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('builder/**/go.sum') }}
-          restore-keys: ${{ runner.os }}-go-
-      - name: Pre-build emacs-builder tool
-        run: make build
-        working-directory: builder
+          name: emacs-builder
+          path: bin
+      - name: Ensure emacs-builder is executable
+        run: chmod +x bin/emacs-builder
       - name: Plan build
         run: >-
-          builder/bin/emacs-builder -l debug plan
-          --output build-plan.yml
+          bin/emacs-builder -l debug plan --output build-plan.yml
           --output-dir '${{ github.workspace }}/builds'
-          --test-build '${{ github.event.inputs.testBuildName }}'
-          --test-release-type '${{ github.event.inputs.testReleaseType }}'
-          ${{ github.event.inputs.extraPlanArgs }}
-          '${{ github.event.inputs.gitRef }}'
+          ${{ needs.prepare.outputs.test_plan_args }}
+          ${{ needs.prepare.outputs.emacs_sha_override }}
+          '${{ inputs.git_ref }}'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Show plan
         run: cat build-plan.yml
-      - name: Check if planned release and asset already exist
-        id: check
-        continue-on-error: true
-        run: >-
-          builder/bin/emacs-builder -l debug release --plan build-plan.yml check
-          ${{ github.event.inputs.extraCheckArgs }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Upload pre-built emacs-builder artifact
-        uses: actions/upload-artifact@v2
-        with:
-          name: emacs-builder
-          path: builder/bin/emacs-builder
-          if-no-files-found: error
       - name: Upload build-plan.yml artifact
         uses: actions/upload-artifact@v2
         with:
-          name: build-plan.yml
+          name: ${{ inputs.artifact_prefix }}build-plan.yml
           path: build-plan.yml
           if-no-files-found: error
+      - name: Check if planned release and asset already exist
+        id: check
+        continue-on-error: true
+        run: |
+          RESULT="$((bin/emacs-builder -l debug release --plan build-plan.yml check && echo 'ok') || echo 'fail')"
+          echo "::set-output name=result::$RESULT"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
   build:
-    runs-on: macos-10.15
-    needs: [plan]
+    runs-on: ${{ inputs.os }}
+    needs: [prepare, plan]
     # Only run if check for existing release and asset failed.
-    if: ${{ needs.plan.outputs.check == 'failure' }}
+    if: ${{ needs.plan.outputs.check == 'fail' }}
     steps:
       - name: Checkout build-emacs-for-macos repo
         uses: actions/checkout@v2
         with:
           repository: jimeh/build-emacs-for-macos
-          ref: ${{ needs.plan.outputs.builder_sha }}
+          ref: ${{ needs.prepare.outputs.builder_sha }}
           path: builder
       - uses: ruby/setup-ruby@v1
         with:
@@ -122,34 +143,30 @@ jobs:
       - name: Download build-plan.yml artifact
         uses: actions/download-artifact@v2
         with:
-          name: build-plan.yml
+          name: ${{ inputs.artifact_prefix }}build-plan.yml
           path: ./
       - name: Build Emacs
         run: >-
           ./builder/build-emacs-for-macos --plan build-plan.yml
-          ${{ github.event.inputs.extraBuildArgs }}
+          --no-relink-eln-files --native-full-aot
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Upload unsigned app artifact
         uses: actions/upload-artifact@v2
         with:
-          name: unsigned-app
+          name: ${{ inputs.artifact_prefix }}unsigned-app
           path: builds/*.tbz
           if-no-files-found: error
 
   package:
-    runs-on: macos-10.15
-    needs: [build]
+    runs-on: ${{ inputs.os }}
+    needs: [prepare, plan, build]
+    # Only run if check for existing release and asset failed.
     steps:
-      - name: Download unsigned app artifact
-        uses: actions/download-artifact@v2
-        with:
-          name: unsigned-app
-          path: builds
-      - name: Extract unsigned app archive
+      - name: Install dependencies
         run: |
-          find * -name '*.tbz' -exec tar xvjf "{}" \;
-        working-directory: builds
+          brew install python
+          $(command -v pip3 || command -v pip) install --upgrade dmgbuild
       - name: Download pre-built emacs-builder artifact
         uses: actions/download-artifact@v2
         with:
@@ -160,8 +177,17 @@ jobs:
       - name: Download build-plan.yml artifact
         uses: actions/download-artifact@v2
         with:
-          name: build-plan.yml
+          name: ${{ inputs.artifact_prefix }}build-plan.yml
           path: ./
+      - name: Download unsigned app artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: ${{ inputs.artifact_prefix }}unsigned-app
+          path: builds
+      - name: Extract unsigned app archive
+        run: |
+          find * -name '*.tbz' -exec tar xvjf "{}" \;
+        working-directory: builds
       - name: Install the Apple signing certificate
         run: |
           # create variables
@@ -187,7 +213,7 @@ jobs:
       - name: Sign, package and notarize build
         run: >-
           bin/emacs-builder -l debug package -v --plan build-plan.yml
-          --sign ${{ github.event.inputs.extraPackageArgs }}
+          --sign --remove-source-dir
         env:
           AC_USERNAME: ${{ secrets.AC_USERNAME }}
           AC_PASSWORD: ${{ secrets.AC_PASSWORD }}
@@ -196,7 +222,7 @@ jobs:
       - name: Upload disk image artifacts
         uses: actions/upload-artifact@v2
         with:
-          name: signed-dmg
+          name: dmg
           path: |
             builds/*.dmg
             builds/*.sha*
@@ -205,31 +231,3 @@ jobs:
         if: ${{ always() }}
         run: |
           security delete-keychain "$RUNNER_TEMP/app-signing.keychain-db"
-
-  release:
-    runs-on: macos-10.15
-    needs: [package]
-    steps:
-      - name: Download pre-built emacs-builder artifact
-        uses: actions/download-artifact@v2
-        with:
-          name: emacs-builder
-          path: bin
-      - name: Ensure emacs-builder is executable
-        run: chmod +x bin/emacs-builder
-      - name: Download build-plan.yml artifact
-        uses: actions/download-artifact@v2
-        with:
-          name: build-plan.yml
-          path: ./
-      - name: Download disk image artifact
-        uses: actions/download-artifact@v2
-        with:
-          name: signed-dmg
-          path: builds
-      - name: Publish disk image to GitHub Release
-        run: >-
-          bin/emacs-builder -l debug release --plan build-plan.yml publish
-          ${{ github.event.inputs.extraReleaseArgs }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/_prepare.yml b/.github/workflows/_prepare.yml
new file mode 100644
index 0000000..bae5813
--- /dev/null
+++ b/.github/workflows/_prepare.yml
@@ -0,0 +1,53 @@
+---
+name: Prepare
+on:
+  workflow_call:
+    inputs:
+      builder_ref:
+        description: Git ref to checkout of build-emacs-for-macos
+        required: true
+        type: string
+    secrets:
+      TAP_REPO_TOKEN:
+        description: Personal Access Token for Homebrew Tap repo
+        required: true
+
+jobs:
+  emacs-builder:
+    # Use oldest version of macOS to ensure emacs-bulder binary is compatible
+    # with later versions of macOS.
+    runs-on: macos-10.15
+    steps:
+      - name: Checkout build-emacs-for-macos repo
+        uses: actions/checkout@v2
+        with:
+          repository: jimeh/build-emacs-for-macos
+          ref: ${{ inputs.builder_ref }}
+          path: builder
+      - name: Store builder Git SHA
+        run: |
+          git rev-parse HEAD > emacs-builder-git-sha.txt
+        working-directory: builder
+      - name: Upload builder git SHA artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: emacs-builder-git-sha
+          path: builder/emacs-builder-git-sha.txt
+          if-no-files-found: error
+      - uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      - uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('builder/**/go.sum') }}
+          restore-keys: ${{ runner.os }}-go-
+      - name: Build emacs-builder tool
+        run: make build
+        working-directory: builder
+      - name: Upload emacs-builder artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: emacs-builder
+          path: builder/bin/emacs-builder
+          if-no-files-found: error
diff --git a/.github/workflows/_release.yml b/.github/workflows/_release.yml
new file mode 100644
index 0000000..3641b30
--- /dev/null
+++ b/.github/workflows/_release.yml
@@ -0,0 +1,52 @@
+---
+# Requires _prepare.yml and _build.yml re-usable workflows to have run.
+name: Release
+on:
+  workflow_call:
+    inputs:
+      plan_artifact:
+        description: Name of artifact containing a emacs-builder plan.yml file
+        type: string
+        required: true
+      dmg_artifact:
+        description: Name of artifact containing a *.dmg files to release
+        type: string
+        required: true
+    secrets:
+      TAP_REPO_TOKEN:
+        description: Personal Access Token for Homebrew Tap repo
+        required: true
+
+jobs:
+  github:
+    runs-on: macos-11
+    steps:
+      - name: Download pre-built emacs-builder artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: emacs-builder
+          path: bin
+      - name: Ensure emacs-builder is executable
+        run: chmod +x bin/emacs-builder
+      - name: Download build-plan.yml artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: ${{ inputs.plan_artifact }}
+          path: ./
+      - name: Download disk image artifacts
+        uses: actions/download-artifact@v2
+        with:
+          name: ${{ inputs.dmg_artifact }}
+          path: builds
+      - name: Publish disk images to a GitHub Release
+        run: >-
+          bin/emacs-builder -l debug release --plan build-plan.yml publish
+          $(find builds -name '*.dmg' -or -name '*.sha256')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Trigger update casks workflow in homebrew tap
+        if: ${{ inputs.testBuildName == '' }}
+        run: >-
+          gh workflow run --repo jimeh/homebrew-emacs-builds update-casks.yml
+        env:
+          GITHUB_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 81f6fcc..dc64193 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,206 +1,67 @@
 ---
 name: Build
 on:
-  schedule:
-    - cron: "0 0 * * *"
   workflow_dispatch:
     inputs:
-      gitRef:
-        description: "Emacs git ref to build"
+      git_ref:
+        description: Emacs git ref to build
         required: true
         default: "master"
-      extraPlanArgs:
-        description: "Extra plan args"
+      git_sha:
+        description: Override Emacs git commit SHA to build
+        required: false
+      builder_ref:
+        description: "Git ref to checkout of build-emacs-for-macos"
+        required: true
+        default: "master"
+      os:
+        description: 'Runner OS ("macos-10.15" or "macos-11")'
+        required: true
+        default: "macos-10.15"
+      test_build_name:
+        description: "Test build name"
         required: false
         default: ""
-      extraCheckArgs:
-        description: "Extra check args"
-        required: false
-        default: ""
-      extraBuildArgs:
-        description: "Extra build args"
-        required: false
-        default: ""
-      extraPackageArgs:
-        description: "Extra package args"
-        required: false
-        default: ""
-      extraReleaseArgs:
-        description: "Extra release args"
+      test_release_type:
+        description: "prerelease or draft"
         required: false
         default: ""
 
 jobs:
-  plan:
-    runs-on: macos-10.15
-    outputs:
-      check: "${{ steps.check.outcome }}"
-    steps:
-      - name: Checkout build-emacs-for-macos repo
-        uses: actions/checkout@v2
-        with:
-          repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.15"
-          path: builder
-      - uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-      - uses: actions/cache@v2
-        id: builder-cache
-        with:
-          path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('builder/**/go.sum') }}
-          restore-keys: ${{ runner.os }}-go-
-      - name: Pre-build emacs-builder tool
-        run: make build
-        working-directory: builder
-      - name: Plan build
-        run: >-
-          builder/bin/emacs-builder -l debug plan
-          --output build-plan.yml
-          --output-dir '${{ github.workspace }}/builds'
-          ${{ github.event.inputs.extraPlanArgs }}
-          '${{ github.event.inputs.gitRef }}'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Show plan
-        run: cat build-plan.yml
-      - name: Check if planned release and asset already exist
-        id: check
-        continue-on-error: true
-        run: >-
-          builder/bin/emacs-builder -l debug release --plan build-plan.yml check
-          ${{ github.event.inputs.extraCheckArgs }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Upload pre-built emacs-builder artifact
-        uses: actions/upload-artifact@v2
-        with:
-          name: emacs-builder
-          path: builder/bin/emacs-builder
-          if-no-files-found: error
-      - name: Upload build-plan.yml artifact
-        uses: actions/upload-artifact@v2
-        with:
-          name: build-plan.yml
-          path: build-plan.yml
-          if-no-files-found: error
+  prepare:
+    name: Prepare
+    uses: jimeh/emacs-builds/.github/workflows/_prepare.yml@main
+    with:
+      builder_ref: ${{ github.event.inputs.builder_ref }}
+    secrets:
+      TAP_REPO_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
 
   build:
-    runs-on: macos-10.15
-    needs: [plan]
-    # Only run if check for existing release and asset failed.
-    if: ${{ needs.plan.outputs.check == 'failure' }}
-    steps:
-      - name: Checkout build-emacs-for-macos repo
-        uses: actions/checkout@v2
-        with:
-          repository: jimeh/build-emacs-for-macos
-          ref: "v0.6.15"
-          path: builder
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: 2.7
-      - name: Install dependencies
-        run: make bootstrap-ci
-        working-directory: builder
-      - name: Download pre-built emacs-builder artifact
-        uses: actions/download-artifact@v2
-        id: builder
-        with:
-          name: emacs-builder
-          path: bin
-      - name: Ensure emacs-builder is executable
-        run: chmod +x bin/emacs-builder
-      - name: Download build-plan.yml artifact
-        uses: actions/download-artifact@v2
-        id: plan
-        with:
-          name: build-plan.yml
-          path: ./
-      - name: Build Emacs
-        run: >-
-          ./builder/build-emacs-for-macos --plan build-plan.yml
-          --no-relink-eln-files --native-full-aot --no-archive
-          ${{ github.event.inputs.extraBuildArgs }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Install the Apple signing certificate
-        run: |
-          # create variables
-          CERTIFICATE_PATH="$RUNNER_TEMP/build_certificate.p12"
-          KEYCHAIN_PATH="$RUNNER_TEMP/app-signing.keychain-db"
-
-          # import certificate and provisioning profile from secrets
-          echo -n "$CERT_BASE64" | base64 --decode --output "$CERTIFICATE_PATH"
-
-          # create temporary keychain
-          security create-keychain -p "$KEYCHAIN_PASSWORD" "$KEYCHAIN_PATH"
-          security set-keychain-settings -lut 21600 "$KEYCHAIN_PATH"
-          security unlock-keychain -p "$KEYCHAIN_PASSWORD" "$KEYCHAIN_PATH"
-
-          # import certificate to keychain
-          security import "$CERTIFICATE_PATH" -P "$CERT_PASSWORD" -A \
-            -t cert -f pkcs12 -k "$KEYCHAIN_PATH"
-          security list-keychain -d user -s "$KEYCHAIN_PATH"
-        env:
-          CERT_BASE64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
-          CERT_PASSWORD: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}
-          KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
-      - name: Sign, package and notarize build
-        run: >-
-          bin/emacs-builder -l debug package -v --plan build-plan.yml
-          --sign --remove-source-dir
-          ${{ github.event.inputs.extraPackageArgs }}
-        env:
-          AC_USERNAME: ${{ secrets.AC_USERNAME }}
-          AC_PASSWORD: ${{ secrets.AC_PASSWORD }}
-          AC_PROVIDER: ${{ secrets.AC_PROVIDER }}
-          AC_SIGN_IDENTITY: ${{ secrets.AC_SIGN_IDENTITY }}
-      - name: Upload disk image artifacts
-        uses: actions/upload-artifact@v2
-        with:
-          name: dmg
-          path: |
-            builds/*.dmg
-            builds/*.sha*
-          if-no-files-found: error
-      - name: Clean up keychain used for signing certificate
-        if: ${{ always() }}
-        run: |
-          security delete-keychain "$RUNNER_TEMP/app-signing.keychain-db"
+    name: Build
+    needs: [prepare]
+    uses: jimeh/emacs-builds/.github/workflows/_build.yml@main
+    with:
+      os: macos-10.15
+      git_ref: ${{ github.event.inputs.git_ref }}
+      git_sha: ${{ github.event.inputs.git_sha }}
+      test_build_name: ${{ github.event.inputs.test_build_name }}
+      test_release_type: ${{ github.event.inputs.test_release_type }}
+    secrets:
+      APPLE_DEVELOPER_CERTIFICATE_P12_BASE64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
+      APPLE_DEVELOPER_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}
+      KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
+      AC_USERNAME: ${{ secrets.AC_USERNAME }}
+      AC_PASSWORD: ${{ secrets.AC_PASSWORD }}
+      AC_PROVIDER: ${{ secrets.AC_PROVIDER }}
+      AC_SIGN_IDENTITY: ${{ secrets.AC_SIGN_IDENTITY }}
+      TAP_REPO_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
 
   release:
-    runs-on: macos-10.15
+    name: Release
     needs: [build]
-    steps:
-      - name: Download pre-built emacs-builder artifact
-        uses: actions/download-artifact@v2
-        id: builder
-        with:
-          name: emacs-builder
-          path: bin
-      - name: Ensure emacs-builder is executable
-        run: chmod +x bin/emacs-builder
-      - name: Download build-plan.yml artifact
-        uses: actions/download-artifact@v2
-        id: plan
-        with:
-          name: build-plan.yml
-          path: ./
-      - name: Download disk image artifact
-        uses: actions/download-artifact@v2
-        with:
-          name: dmg
-          path: builds
-      - name: Publish disk image to a GitHub Release
-        run: >-
-          bin/emacs-builder -l debug release --plan build-plan.yml publish
-          ${{ github.event.inputs.extraReleaseArgs }}
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Trigger update casks workflow in homebrew tap
-        run: >-
-          gh workflow run --repo jimeh/homebrew-emacs-builds update-casks.yml
-        env:
-          GITHUB_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
+    uses: jimeh/emacs-builds/.github/workflows/_release.yml@main
+    with:
+      plan_artifact: big-sur_build-plan.yml
+      dmg_artifact: dmg
+    secrets:
+      TAP_REPO_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
diff --git a/.github/workflows/nightly-master.yml b/.github/workflows/nightly-master.yml
new file mode 100644
index 0000000..268289d
--- /dev/null
+++ b/.github/workflows/nightly-master.yml
@@ -0,0 +1,48 @@
+---
+name: Nightly (master)
+on:
+  push:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+    inputs:
+      git_sha:
+        description: Override Emacs git commit SHA to build
+        required: false
+
+jobs:
+  prepare:
+    name: Prepare
+    uses: jimeh/emacs-builds/.github/workflows/_prepare.yml@main
+    with:
+      builder_ref: v0.6.17
+    secrets:
+      TAP_REPO_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
+
+  build:
+    name: Build
+    needs: [prepare]
+    uses: jimeh/emacs-builds/.github/workflows/_build.yml@main
+    with:
+      os: macos-10.15
+      git_ref: master
+      git_sha: ${{ github.event.inputs.git_sha }}
+    secrets:
+      APPLE_DEVELOPER_CERTIFICATE_P12_BASE64: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_P12_BASE64 }}
+      APPLE_DEVELOPER_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_DEVELOPER_CERTIFICATE_PASSWORD }}
+      KEYCHAIN_PASSWORD: ${{ secrets.KEYCHAIN_PASSWORD }}
+      AC_USERNAME: ${{ secrets.AC_USERNAME }}
+      AC_PASSWORD: ${{ secrets.AC_PASSWORD }}
+      AC_PROVIDER: ${{ secrets.AC_PROVIDER }}
+      AC_SIGN_IDENTITY: ${{ secrets.AC_SIGN_IDENTITY }}
+      TAP_REPO_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}
+
+  release:
+    name: Release
+    needs: [build]
+    uses: jimeh/emacs-builds/.github/workflows/_release.yml@main
+    with:
+      plan_artifact: catalina_build-plan.yml
+      dmg_artifact: dmg
+    secrets:
+      TAP_REPO_TOKEN: ${{ secrets.TAP_REPO_TOKEN }}