diff --git a/.github/workflows/build_windows.yml b/.github/workflows/build_windows.yml
index b71f80e1a..08227cd61 100644
--- a/.github/workflows/build_windows.yml
+++ b/.github/workflows/build_windows.yml
@@ -139,7 +139,7 @@ jobs:
           cmake -B _build -S .  -DDEPS_INSTALL_DIR=rte-antares-deps-Release  -DCMAKE_PREFIX_PATH="$pwd\rte-antares-${{steps.antares-version.outputs.result}}-installer-64bits"  -DBUILD_TESTING=ON  -DCMAKE_BUILD_TYPE=Release  -DCMAKE_TOOLCHAIN_FILE="${{env.VCPKG_ROOT}}/scripts/buildsystems/vcpkg.cmake"  -DVCPKG_TARGET_TRIPLET=${{ matrix.triplet }}  -DCMAKE_INSTALL_PREFIX=_install  -DBUILD_UI=ON  -DXPRESS=${{ env.XPRESS_VALUE }}  -DXPRESS_ROOT="${{ env.XPRESSDIR }}"
       - name: Build
         run: |
-          cmake --build _build --config Release -j$(nproc)
+          cmake --build _build --config Release -j4
 
       - name: Running unit tests
         timeout-minutes: 120
diff --git a/.github/workflows/windows-vcpkg-deps-build.yml b/.github/workflows/windows-vcpkg-deps-build.yml
index 3cd82f7d1..a15055b59 100644
--- a/.github/workflows/windows-vcpkg-deps-build.yml
+++ b/.github/workflows/windows-vcpkg-deps-build.yml
@@ -96,7 +96,7 @@ jobs:
 
       - name: Build
         run: |
-          cmake --build _build --config Release -j$(nproc)
+          cmake --build _build --config Release -j4
           cd _build
           cmake --install .
 
diff --git a/.github/workflows/windows-vcpkg.yml b/.github/workflows/windows-vcpkg.yml
index 8d91019f2..8fc06fe7c 100644
--- a/.github/workflows/windows-vcpkg.yml
+++ b/.github/workflows/windows-vcpkg.yml
@@ -191,7 +191,7 @@ jobs:
 
       - name: Build
         run: |
-          cmake --build _build --config Release -j$(nproc)
+          cmake --build _build --config Release -j4
           cd _build
           cmake --install .