On Wed, Oct 28, 2020 at 04:33:12PM +0100, Thibaut Appel wrote: > install libcrypto.so.1.1 -> > /rds/general/user/home/.linuxbrew/Cellar/openssl@1.1/1.1.1h/lib/libcrypto.so > ar: > /rds/general/user/home/.linuxbrew/Cellar/openssl@1.1/1.1.1h/lib/libcrypto.so: > file format not recognized Wild guess, you may have more than one "ar" on your system, and one of them does not like files produced by the other? I haven't had trouble building OpenSSL 1.1.1 from the upstream sources. Don't know whether "linuxbrew" introduces any additional concerns, I've never used that. -- Viktor.