diff --git a/.github/workflows/ci-test-package-cmake.yml b/.github/workflows/ci-test-package-cmake.yml
index 4b3cacec..baf58b59 100644
--- a/.github/workflows/ci-test-package-cmake.yml
+++ b/.github/workflows/ci-test-package-cmake.yml
@@ -235,7 +235,7 @@ jobs:
         shell: bash
         run: |
           conan install . -b missing -c tools.cmake.cmaketoolchain:generator="Ninja Multi-Config" -c user.mp-units.build:all=False \
-                          -o '&:cxx_modules=${{ matrix.config.cxx_modules }}' -o '&:std_format=${{ env.std_format }}' -o '&:contracts=${{ matrix.contracts }}'
+                          -o '&:cxx_modules=${{ matrix.config.cxx_modules }}' -o '&:import_std=False' -o '&:std_format=${{ env.std_format }}' -o '&:contracts=${{ matrix.contracts }}'
       - name: Provide dependencies for the build
         shell: bash
         working-directory: src