: Most Conan 1 recipes need updates. Use conan create --version=1.0 --name=oldpkg .
# Conan 1 profile [settings] os=Macos os.version=10.15 compiler=apple-clang compiler.version=12.0 [settings] os=macOS os.version=11.0 compiler=apple-clang compiler.version=13.0 compiler.libcxx=libc++ conan 2 migration
# Conan 1 (conanfile.py) generators = "cmake_paths", "cmake_find_package" generators = "CMakeToolchain", "CMakeDeps" : Most Conan 1 recipes need updates
In your CMake:
# Conan 2 def layout(self): cmake_layout(self) # standard src/build pattern Option A – Keep both : Install Conan 2 separately, use conan install --version=1.x for legacy. "cmake_find_package" generators = "CMakeToolchain"