I’m trying to install paramiko in Cygwin and one of the build dependencies is bcrypt. I have rustc installed and I believe all of the supporting build libraries.
Pip is also updated to the latest.
$ pip --version pip 22.2.2 from /usr/local/lib/python3.8/site-packages/pip (python 3.8)
I use the following pip command:
pip install bcrypt
And I get the following error output:
error: failed to run custom build command for `pyo3-build-config v0.15.2` Caused by: process didn't exit successfully: `C:Cygwin64tmppip-install-19d9duslbcrypt_117761e212a240d8804ceae0beeb39c1src_bcrypttargetreleasebuildpyo3-build-config-2ef06b5f5d02e46bbuild-script-build` (exit code: 1) --- stdout cargo:rerun-if-env-changed=PYO3_CONFIG_FILE cargo:rerun-if-env-changed=PYO3_NO_PYTHON cargo:rerun-if-env-changed=PYO3_PYTHON --- stderr error: failed to run the Python interpreter at /usr/bin/python.exe: The system cannot find the path specified. (os error 3) warning: build failed, waiting for other jobs to finish... cargo rustc --lib --message-format=json-render-diagnostics --manifest-path src/_bcrypt/Cargo.toml --release -v --features pyo3/abi3-py36 pyo3/extension-module -- --crate-type cdylib =============================DEBUG ASSISTANCE============================= If you are seeing a compilation error please try the following steps to successfully install bcrypt: 1) Upgrade to the latest pip and try again. This will fix errors for most users. See: https://pip.pypa.io/en/stable/installing/#upgrading-pip 2) Ensure you have a recent Rust toolchain installed. bcrypt requires rustc >= 1.56.0. Python: 3.8.12 platform: CYGWIN_NT-10.0-19044-3.3.5-341.x86_64-x86_64-64bit-WindowsPE pip: n/a setuptools: 65.3.0 setuptools_rust: 1.5.1 rustc: 1.63.0 (4b91a6ea7 2022-08-08) =============================DEBUG ASSISTANCE============================= error: `cargo rustc --lib --message-format=json-render-diagnostics --manifest-path src/_bcrypt/Cargo.toml --release -v --features 'pyo3/abi3-py36 pyo3/extension-module' -- --crate-type cdylib` failed with code 101 [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. ERROR: Failed building wheel for bcrypt Failed to build bcrypt ERROR: Could not build wheels for bcrypt, which is required to install pyproject.toml-based projects
I check my python installation (python.exe) and it is installed at /usr/bin/python.exe.
$ ls /usr/bin/python* /usr/bin/python.exe /usr/bin/python2.7.exe /usr/bin/python3.8-config /usr/bin/python2-config /usr/bin/python3 /usr/bin/python3.8.exe /usr/bin/python2.7-config /usr/bin/python3-config
So I am confused…..what is the issue? Why can’t it find my python interpreter? Why is bcrypt not building and installing?
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Answer
I’m guessing that Cygwin causes some compatibility issues here.
It looks like Cygwin has a package for this purpose, likely to avoid these issues: