diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index 52f7425..447e041 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -84,13 +84,13 @@ jobs:
       run: mkdir __build_static __build_shared
     - name: Configure static
       working-directory: __build_static
-      run: cmake .. -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=nowide -DCMAKE_BUILD_TYPE=Debug
+      run: cmake .. -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=nowide -DCMAKE_BUILD_TYPE=Debug -DBOOST_NOWIDE_INSTALL=OFF
     - name: Build & Test static
       working-directory: __build_static
       run: cmake --build . --config Debug && ctest --output-on-failure --build-config Debug
     - name: Configure shared
       working-directory: __build_shared
-      run: cmake .. -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=nowide -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=ON
+      run: cmake .. -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=nowide -DCMAKE_BUILD_TYPE=Debug -DBUILD_SHARED_LIBS=ON -DBOOST_NOWIDE_INSTALL=OFF
     - name: Build & Test shared
       working-directory: __build_shared
       run: cmake --build . --config Debug && ctest --output-on-failure --build-config Debug
diff --git a/appveyor.yml b/appveyor.yml
index ea9e7f0..15099b0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -87,7 +87,7 @@ test_script:
           ./b2 --clean
 
           mkdir __build_static | cd
-          cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=nowide ..
+          cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=nowide -DBOOST_NOWIDE_INSTALL=OFF ..
           cmake --build . --config Debug
           ctest --output-on-failure --build-config Debug
           cmake --build . --config Release
@@ -96,7 +96,7 @@ test_script:
           cd ..
 
           mkdir __build_shared | cd
-          cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBUILD_SHARED_LIBS=ON -DBOOST_INCLUDE_LIBRARIES=nowide ..
+          cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBUILD_SHARED_LIBS=ON -DBOOST_INCLUDE_LIBRARIES=nowide -DBOOST_NOWIDE_INSTALL=OFF ..
           cmake --build . --config Debug
           ctest --output-on-failure --build-config Debug
           cmake --build . --config Release