diff --git a/.github/workflows/build_fw.yml b/.github/workflows/build_fw.yml
index fbc3436..20f104b 100644
--- a/.github/workflows/build_fw.yml
+++ b/.github/workflows/build_fw.yml
@@ -58,7 +58,7 @@ jobs:
         - name: Compile all examples
           uses: ArminJo/arduino-test-compile@v3
           with:
-            arduino-board-fqbn: MightyCore:avr:1284:BOD=disabled,LTO=Os,${{ matrix.fqbn }},variant=modelP --build-property compiler.cpp.extra_flags="-DCHANNELS=${{ matrix.channels }}"
+            arduino-board-fqbn: MightyCore:avr:1284:BOD=disabled,LTO=Os,${{ matrix.fqbn }},variant=modelP --build-property compiler.cpp.extra_flags="-DCHANNELS=${{ matrix.channels }} -DBUILD=${{ github.run_number }}"
             platform-url:  https://mcudude.github.io/MiniCore/package_MCUdude_MiniCore_index.json https://mcudude.github.io/MightyCore/package_MCUdude_MightyCore_index.json
             sketch-names-find-start: fw/${{ matrix.type }}
             set-build-path: true
@@ -136,7 +136,7 @@ jobs:
           
       - run: |
           cd build;
-          find -type f -exec bash -c 'mv $0 $(echo $0|sed "s/\//_/2")' {} \;
+          find -type f -exec bash -c 'mv $0 $(echo $0|sed "s/\//_/2"|sed 's/\./${{github.build_number}}./g')' {} \;
           cd ..;
     
 #       - name: Upload Release Asset