diff --git a/.github/workflows/altair.yml b/.github/workflows/altair.yml
deleted file mode 100644
index cb99770ef..000000000
--- a/.github/workflows/altair.yml
+++ /dev/null
@@ -1,313 +0,0 @@
-name: Altair beta build (rolling release)
-on:
-  #schedule:
-    #- cron: "45 5 * * *"
-  workflow_dispatch:
-  #pull_request:
-
-jobs:
-  build-amd64:
-    name: Linux AMD64 release asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Build project
-        id: make_dist
-        run: |
-          make dist-amd64
-          cd dist
-          ARCHIVE=$(echo *.tar.gz)
-          tar -xzf ${ARCHIVE}
-          NEW_ARCHIVE_DIR="nimbus-eth2_Linux_amd64_$(date +%Y%m%d)_$(git rev-parse --short=8 HEAD)"
-          mv ${ARCHIVE%.tar.gz} ${NEW_ARCHIVE_DIR}
-          tar -czf ${NEW_ARCHIVE_DIR}.tar.gz ${NEW_ARCHIVE_DIR}
-          echo "::set-output name=archive::"${NEW_ARCHIVE_DIR}.tar.gz
-          echo "::set-output name=archive_dir::"${NEW_ARCHIVE_DIR}
-
-      - name: Upload archive artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Linux_amd64_archive
-          path: ./dist/${{ steps.make_dist.outputs.archive }}
-          retention-days: 2
-
-      - name: Upload checksum artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Linux_amd64_checksum
-          path: ./dist/${{ steps.make_dist.outputs.archive_dir }}/build/nimbus_beacon_node.sha512sum
-          retention-days: 2
-
-  build-arm64:
-    name: Linux ARM64 release asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Install packages
-        env:
-          DEBIAN_FRONTEND: "noninteractive"
-          TZ: "Etc/UTC"
-        run: |
-          sudo apt-get -qq update
-          sudo apt-get -qq -y install binfmt-support qemu-user-static
-
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Build project
-        id: make_dist
-        run: |
-          make dist-arm64
-          cd dist
-          ARCHIVE=$(echo *.tar.gz)
-          tar -xzf ${ARCHIVE}
-          NEW_ARCHIVE_DIR="nimbus-eth2_Linux_arm64v8_$(date +%Y%m%d)_$(git rev-parse --short=8 HEAD)"
-          mv ${ARCHIVE%.tar.gz} ${NEW_ARCHIVE_DIR}
-          tar -czf ${NEW_ARCHIVE_DIR}.tar.gz ${NEW_ARCHIVE_DIR}
-          echo "::set-output name=archive::"${NEW_ARCHIVE_DIR}.tar.gz
-          echo "::set-output name=archive_dir::"${NEW_ARCHIVE_DIR}
-
-      - name: Upload archive artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Linux_arm64_archive
-          path: ./dist/${{ steps.make_dist.outputs.archive }}
-          retention-days: 2
-
-      - name: Upload checksum artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Linux_arm64_checksum
-          path: ./dist/${{ steps.make_dist.outputs.archive_dir }}/build/nimbus_beacon_node.sha512sum
-          retention-days: 2
-
-  build-arm:
-    name: Linux ARM release asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Install packages
-        env:
-          DEBIAN_FRONTEND: "noninteractive"
-          TZ: "Etc/UTC"
-        run: |
-          sudo apt-get -qq update
-          sudo apt-get -qq -y install binfmt-support qemu-user-static
-
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Build project
-        id: make_dist
-        run: |
-          make dist-arm
-          cd dist
-          ARCHIVE=$(echo *.tar.gz)
-          tar -xzf ${ARCHIVE}
-          NEW_ARCHIVE_DIR="nimbus-eth2_Linux_arm32v7_$(date +%Y%m%d)_$(git rev-parse --short=8 HEAD)"
-          mv ${ARCHIVE%.tar.gz} ${NEW_ARCHIVE_DIR}
-          tar -czf ${NEW_ARCHIVE_DIR}.tar.gz ${NEW_ARCHIVE_DIR}
-          echo "::set-output name=archive::"${NEW_ARCHIVE_DIR}.tar.gz
-          echo "::set-output name=archive_dir::"${NEW_ARCHIVE_DIR}
-
-      - name: Upload archive artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Linux_arm_archive
-          path: ./dist/${{ steps.make_dist.outputs.archive }}
-          retention-days: 2
-
-      - name: Upload checksum artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Linux_arm_checksum
-          path: ./dist/${{ steps.make_dist.outputs.archive_dir }}/build/nimbus_beacon_node.sha512sum
-          retention-days: 2
-
-  build-win64:
-    name: Windows AMD64 release asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Build project
-        id: make_dist
-        run: |
-          make dist-win64
-          cd dist
-          ARCHIVE=$(echo *.tar.gz)
-          tar -xzf ${ARCHIVE}
-          NEW_ARCHIVE_DIR="nimbus-eth2_Windows_amd64_$(date +%Y%m%d)_$(git rev-parse --short=8 HEAD)"
-          mv ${ARCHIVE%.tar.gz} ${NEW_ARCHIVE_DIR}
-          tar -czf ${NEW_ARCHIVE_DIR}.tar.gz ${NEW_ARCHIVE_DIR}
-          echo "::set-output name=archive::"${NEW_ARCHIVE_DIR}.tar.gz
-          echo "::set-output name=archive_dir::"${NEW_ARCHIVE_DIR}
-
-      - name: Upload archive artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Windows_amd64_archive
-          path: ./dist/${{ steps.make_dist.outputs.archive }}
-          retention-days: 2
-
-      - name: Upload checksum artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: Windows_amd64_checksum
-          path: ./dist/${{ steps.make_dist.outputs.archive_dir }}/build/nimbus_beacon_node.sha512sum
-          retention-days: 2
-
-  build-macos-amd64:
-    name: macOS AMD64 release asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Build project
-        id: make_dist
-        run: |
-          make dist-macos
-          cd dist
-          ARCHIVE=$(echo *.tar.gz)
-          tar -xzf ${ARCHIVE}
-          NEW_ARCHIVE_DIR="nimbus-eth2_macOS_amd64_$(date +%Y%m%d)_$(git rev-parse --short=8 HEAD)"
-          mv ${ARCHIVE%.tar.gz} ${NEW_ARCHIVE_DIR}
-          tar -czf ${NEW_ARCHIVE_DIR}.tar.gz ${NEW_ARCHIVE_DIR}
-          echo "::set-output name=archive::"${NEW_ARCHIVE_DIR}.tar.gz
-          echo "::set-output name=archive_dir::"${NEW_ARCHIVE_DIR}
-
-      - name: Upload archive artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: macOS_amd64_archive
-          path: ./dist/${{ steps.make_dist.outputs.archive }}
-          retention-days: 2
-
-      - name: Upload checksum artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: macOS_amd64_checksum
-          path: ./dist/${{ steps.make_dist.outputs.archive_dir }}/build/nimbus_beacon_node.sha512sum
-          retention-days: 2
-
-  build-macos-arm64:
-    name: macOS ARM64 release asset
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Build project
-        id: make_dist
-        run: |
-          make dist-macos-arm64
-          cd dist
-          ARCHIVE=$(echo *.tar.gz)
-          tar -xzf ${ARCHIVE}
-          NEW_ARCHIVE_DIR="nimbus-eth2_macOS_arm64_$(date +%Y%m%d)_$(git rev-parse --short=8 HEAD)"
-          mv ${ARCHIVE%.tar.gz} ${NEW_ARCHIVE_DIR}
-          tar -czf ${NEW_ARCHIVE_DIR}.tar.gz ${NEW_ARCHIVE_DIR}
-          echo "::set-output name=archive::"${NEW_ARCHIVE_DIR}.tar.gz
-          echo "::set-output name=archive_dir::"${NEW_ARCHIVE_DIR}
-
-      - name: Upload archive artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: macOS_arm64_archive
-          path: ./dist/${{ steps.make_dist.outputs.archive }}
-          retention-days: 2
-
-      - name: Upload checksum artefact
-        uses: actions/upload-artifact@v2
-        with:
-          name: macOS_arm64_checksum
-          path: ./dist/${{ steps.make_dist.outputs.archive_dir }}/build/nimbus_beacon_node.sha512sum
-          retention-days: 2
-
-  prepare-prerelease:
-    name: Prepare pre-release
-    needs: [build-amd64, build-arm64, build-arm, build-win64, build-macos-amd64, build-macos-arm64]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          ref: unstable
-
-      - name: Download artefacts
-        uses: actions/download-artifact@v2
-
-      - name: Create release notes
-        run: |
-          cat > release_notes.md <<EOF
-          ## SHA512 checksums
-
-          \`\`\`text
-          EOF
-          echo '# Linux AMD64' >> release_notes.md
-          cat Linux_amd64_checksum/* >> release_notes.md
-          echo '# Linux ARM64' >> release_notes.md
-          cat Linux_arm64_checksum/* >> release_notes.md
-          echo '# Linux ARM' >> release_notes.md
-          cat Linux_arm_checksum/* >> release_notes.md
-          echo '# Windows AMD64' >> release_notes.md
-          cat Windows_amd64_checksum/* >> release_notes.md
-          echo '# macOS AMD64' >> release_notes.md
-          cat macOS_amd64_checksum/* >> release_notes.md
-          echo '# macOS ARM64' >> release_notes.md
-          cat macOS_arm64_checksum/* >> release_notes.md
-          echo '```' >> release_notes.md
-
-      - name: Delete tag
-        uses: dev-drprasad/delete-tag-and-release@v0.2.0
-        with:
-          delete_release: true
-          tag_name: altair-beta
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Create prerelease
-        run: |
-          gh release create altair-beta --prerelease --target unstable \
-            --title 'Altair beta build (rolling release, experimental)' --notes-file release_notes.md \
-            Linux_amd64_archive/* \
-            Linux_arm64_archive/* \
-            Linux_arm_archive/* \
-            Windows_amd64_archive/* \
-            macOS_amd64_archive/* \
-            macOS_arm64_archive/*
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Delete artefacts
-        uses: geekyeggo/delete-artifact@v1
-        with:
-          failOnError: false
-          name: |
-            Linux_amd64_archive
-            Linux_amd64_checksum
-            Linux_arm64_archive
-            Linux_arm64_checksum
-            Linux_arm_archive
-            Linux_arm_checksum
-            Windows_amd64_archive
-            Windows_amd64_checksum
-            macOS_amd64_archive
-            macOS_amd64_checksum
-            macOS_arm64_archive
-            macOS_arm64_checksum
-