diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 00aeee8f..2558afff 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -12,7 +12,9 @@ jobs:
         sudo apt-get update
         sudo apt-get install libsdl2-dev
     - name: Compile
-      run: make release -j$(nproc)
+      run: |
+        echo I_ACKNOWLEDGE_THE_MAKEFILE_IS_DEPRECATED=1 > Makefile.local
+        make release -j$(nproc)
   windows-legacy:
     name: Windows (Legacy Makefile)
     runs-on: windows-2022
@@ -20,6 +22,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: Compile
       run: |
+        echo I_ACKNOWLEDGE_THE_MAKEFILE_IS_DEPRECATED=1 > Makefile.local
         make release -j $env:NUMBER_OF_PROCESSORS
   macos-legacy:
     name: macOS (Legacy Makefile)
@@ -27,7 +30,9 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Compile
-      run: make release -j$(sysctl -n hw.logicalcpu)
+      run:  |
+        echo I_ACKNOWLEDGE_THE_MAKEFILE_IS_DEPRECATED=1 > Makefile.local
+        make release -j$(sysctl -n hw.logicalcpu)
   emscripten-legacy:
     name: Emscripten (Legacy Makefile)
     runs-on: ubuntu-latest
@@ -44,6 +49,7 @@ jobs:
         ./emsdk activate 3.1.58
     - name: Compile
       run: |
+        echo I_ACKNOWLEDGE_THE_MAKEFILE_IS_DEPRECATED=1 > Makefile.local
         source emsdk/emsdk_env.sh
         emmake make release -j$(nproc)