Due to the special environment, the computer cannot be connected to the Internet, but the Python script I wrote needs to use the gssapi library. the OS is Linux. I have another computer that can connect to the Internet and has the same Python version. I download the dependency files in the 'test-requirements.txt' file on a computer with internet access, copied them to a computer without internet access. these dependency files stored in ‘bao’ folder and executed ‘pip install --no-index --find-links=./bao -r test-requirements.txt’ to installed dependency. Then I download this project from Github and copied it to a computer without internet access. run ‘ pip install . ’ it will report 'installing build dependencies ... error Error: Command errored out with exit status 1: .........'