diff --git a/.github/workflows/ci-test-package-cmake.yml b/.github/workflows/ci-test-package-cmake.yml
index 4bc698d3..9710dda1 100644
--- a/.github/workflows/ci-test-package-cmake.yml
+++ b/.github/workflows/ci-test-package-cmake.yml
@@ -89,7 +89,8 @@ jobs:
       - name: Configure test_package CMake
         run: |
           mkdir -p test_package/build/${{ matrix.build_type }} && cd test_package/build/${{ matrix.build_type }}
-          cmake ../.. -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DCMAKE_INSTALL_PREFIX=../../../build/${{ matrix.build_type }}/test_package -DCMAKE_TOOLCHAIN_FILE=../../../build/${{ matrix.build_type }}/conan_toolchain.cmake
+          conan install ../../.. -s compiler.cppstd=20 -s compiler.libcxx=libstdc++11 -s build_type=${{ matrix.build_type }}
+          cmake ../.. -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} -DCMAKE_INSTALL_PREFIX=../../../build/${{ matrix.build_type }}/test_package -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake
       - name: Build test_package
         run: |
           cd test_package/build/${{ matrix.build_type }}
diff --git a/test_package/CMakeLists.txt b/test_package/CMakeLists.txt
index 02b59d0a..446056c0 100644
--- a/test_package/CMakeLists.txt
+++ b/test_package/CMakeLists.txt
@@ -23,9 +23,6 @@
 cmake_minimum_required(VERSION 3.15)
 project(test_package)
 
-# enable package discovery based on the local configuration files
-list(PREPEND CMAKE_PREFIX_PATH ${CMAKE_BINARY_DIR})
-
 find_package(mp-units CONFIG REQUIRED)
 
 add_executable(test_package test_package.cpp)