diff --git a/.github/workflows/emu-build-variant-linux.yml b/.github/workflows/emu-build-variant-linux.yml
index 13b5f081..42ab0f1b 100644
--- a/.github/workflows/emu-build-variant-linux.yml
+++ b/.github/workflows/emu-build-variant-linux.yml
@@ -114,7 +114,7 @@ jobs:
     - name: Build target(s)
       shell: bash
       working-directory: ${{ github.workspace }}
-      run: "sudo chmod 777 build_linux.sh && ./build_linux.sh -verbose ${{ env.build_mode }} clean +build_str ${{ github.sha }} ${{ env.build_switches }}"
+      run: "sudo chmod 777 build_linux.sh && ./build_linux.sh -j 3 -verbose ${{ env.build_mode }} clean +build_str ${{ github.sha }} ${{ env.build_switches }}"
 
 ### upload artifact/package to github Actions (for targets)
     - name: Upload build package (for targets)
diff --git a/.github/workflows/emu-build-variant-win.yml b/.github/workflows/emu-build-variant-win.yml
index c4c28552..61153f32 100644
--- a/.github/workflows/emu-build-variant-win.yml
+++ b/.github/workflows/emu-build-variant-win.yml
@@ -121,7 +121,7 @@ jobs:
       if: inputs.emu-variant != 'all'
       shell: cmd
       working-directory: ${{ github.workspace }}
-      run: build_win.bat -verbose ${{ env.build_mode }} clean +build_str ${{ github.sha }} ${{ env.build_switches }}
+      run: build_win.bat -j 3 -verbose ${{ env.build_mode }} clean +build_str ${{ github.sha }} ${{ env.build_switches }}
 
 ### upload artifact/package to github Actions (for targets)
     - name: Upload build package (for targets)