reverted workflow to non rack toolchain build version due to legal issues with MacOS SDK usage

Author: qno

.github/workflows/build-plugin.yml

@@ -2,26 +2,46 @@ name: Build VCV Rack Plugin
 on: [push, pull_request]
 
 env:
-  rack-plugin-toolchain-dir: /home/build/rack-plugin-toolchain
+  rack-sdk-version: 2.1.0
 
 defaults:
   run:
     shell: bash
 
 jobs:
   build:
-    name: ${{ matrix.platform }}
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/qno/rack-plugin-toolchain:v2
-      options: --user root
+    name: ${{ matrix.config.name }}
+    runs-on: ${{ matrix.config.os }}
     strategy:
       matrix:
-        platform: [linux, mac, win]
+        config:
+        - {
+            name: Linux,
+            sdk-platform: lin,
+            os: ubuntu-latest,
+            prepare-os: sudo apt update && sudo apt install -y libglu-dev
+          }
+        - {
+            name: MacOS,
+            sdk-platform: mac,
+            os: macos-latest,
+            prepare-os: ""
+          }
+        - {
+            name: Windows,
+            sdk-platform: win,
+            os: windows-latest,
+            prepare-os: export CC=gcc
+          }
     steps:
       - uses: actions/checkout@v3
         with:
           submodules: recursive
+      - name: Get Rack-SDK
+        run: |
+          pushd $HOME
+          curl -o Rack-SDK.zip https://vcvrack.com/downloads/Rack-SDK-${{ env.rack-sdk-version }}-${{ matrix.config.sdk-platform }}.zip
+          unzip Rack-SDK.zip
       - name: Modify plugin version
         # only modify plugin version if no tag was created
         if: "! startsWith(github.ref, 'refs/tags/v')"
@@ -32,14 +52,15 @@ jobs:
           cat <<< `jq --arg VERSION "$pluginversion-$gitrev" '.version=$VERSION' plugin.json` > plugin.json
       - name: Build plugin
         run: |
-          export PLUGIN_DIR=$GITHUB_WORKSPACE
-          pushd ${{ env.rack-plugin-toolchain-dir }}
-          make plugin-build-${{ matrix.platform }}
+          ${{ matrix.config.prepare-os }}
+          export RACK_DIR=$HOME/Rack-SDK
+          make -j dep
+          make -j dist
       - name: Upload artifact
         uses: actions/upload-artifact@v2
         with:
-          path: ${{ env.rack-plugin-toolchain-dir }}/plugin-build
-          name: ${{ matrix.platform }}
+          path: dist
+          name: ${{ matrix.config.name }}
 
   publish:
     name: Publish plugin

plugin.json

@@ -1,7 +1,7 @@
 {
   "slug": "MyPlugin",
   "name": "MyPlugin",
-  "version": "2.0.7",
+  "version": "2.1.0",
   "license": "GPL-3.0-or-later",
   "brand": "MyBrand",
   "author": "Me",