Hi Hiroe, I notice that you’re running a new Python from /usr/local. I guess that means you compiled it yourself. It looks like it’s not set up for SSL. That doesn’t happen automatically. You can find instructions on how to do this online, however 14.04 is really, really old. I suspect you are going to encounter other issues building Firedrake there. Can you not upgrade to a more recent LTS release? Yours, David From: firedrake-bounces@imperial.ac.uk <firedrake-bounces@imperial.ac.uk> on behalf of Yamazaki, Hiroe <h.yamazaki@imperial.ac.uk> Date: Monday, 6 December 2021 at 12:13 To: firedrake <firedrake@imperial.ac.uk> Subject: [firedrake] firedrake install failed when downloading Eigen Hi firedrake team, I am installing firedrake on my Ubuntu 14.04 and failed when downloading Eigen due to ssl.SSLCertVerificationError. Some of the error messages are as below, and I’ve attached firedrake-install.log. Any help to fix this would be appreciated. All the best, Hiroe *** Downloading Eigen from 'https://github.com/eigenteam/eigen-git-mirror/archive/3.3.3.tar.gz' to 'eigen-3.3.3.tgz' Traceback (most recent call last): File "/usr/local/lib/python3.7/urllib/request.py", line 1317, in do_open encode_chunked=req.has_header('Transfer-encoding')) File "/usr/local/lib/python3.7/http/client.py", line 1229, in request self._send_request(method, url, body, headers, encode_chunked) File "/usr/local/lib/python3.7/http/client.py", line 1275, in _send_request self.endheaders(body, encode_chunked=encode_chunked) File "/usr/local/lib/python3.7/http/client.py", line 1224, in endheaders self._send_output(message_body, encode_chunked=encode_chunked) File "/usr/local/lib/python3.7/http/client.py", line 1016, in _send_output self.send(msg) File "/usr/local/lib/python3.7/http/client.py", line 956, in send self.connect() File "/usr/local/lib/python3.7/http/client.py", line 1392, in connect server_hostname=server_hostname) File "/usr/local/lib/python3.7/ssl.py", line 412, in wrap_socket session=session File "/usr/local/lib/python3.7/ssl.py", line 850, in _create self.do_handshake() File "/usr/local/lib/python3.7/ssl.py", line 1108, in do_handshake self._sslobj.do_handshake() ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "firedrake-install", line 1649, in <module> install("petsc/") File "firedrake-install", line 882, in install build_and_install_petsc() File "firedrake-install", line 995, in build_and_install_petsc urllib.request.urlretrieve(url, filename=tarball) File "/usr/local/lib/python3.7/urllib/request.py", line 247, in urlretrieve with contextlib.closing(urlopen(url, data)) as fp: File "/usr/local/lib/python3.7/urllib/request.py", line 222, in urlopen return opener.open(url, data, timeout) File "/usr/local/lib/python3.7/urllib/request.py", line 525, in open response = self._open(req, data) File "/usr/local/lib/python3.7/urllib/request.py", line 543, in _open '_open', req) File "/usr/local/lib/python3.7/urllib/request.py", line 503, in _call_chain result = func(*args) File "/usr/local/lib/python3.7/urllib/request.py", line 1360, in https_open context=self._context, check_hostname=self._check_hostname) File "/usr/local/lib/python3.7/urllib/request.py", line 1319, in do_open raise URLError(err) urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045)> ***