Here is a comprehensive guide on why this happens and how to fix it. Why is this happening?
If this returns "command not found," your installation isn't in your . You will need to add the /bin folder of your CMake installation to your environment variables. Summary Checklist Is CMake installed? If no, install it from cmake.org. Is it in your PATH? Type cmake --version to verify. cmake was not found locally and download failed
Ensure your HTTP_PROXY and HTTPS_PROXY environment variables are set correctly. Here is a comprehensive guide on why this
If you’re working on a C++ project, trying to install a library via a package manager, or building a project from source, encountering the error can bring your workflow to a grinding halt. You will need to add the /bin folder
If you are in a corporate environment or behind a proxy, the "download failed" part of the error is likely due to blocked traffic.
This error typically occurs when a build script (often a setup.py for Python bindings or a shell script) detects that CMake is missing from your system and attempts—but fails—to download a portable version of it.
Run pip install cmake to provide a local binary.