Hi, While trying to build openssl 1.1.0c on Windows, the configure step failed for me if I used a perl that is on a network share. Example: \\rdlserv\tools\nt\asperl-5.24.0\bin\perl ./Configure VC-WIN64A enable-weak-ssl-ciphers enable-rc4 enable-deprecated no-shared --prefix=z:\openssl\work\nt64\install -openssldir=z:\openssl\work\nt64\install It fails at the system call: my $cmd = "$perlcmd \"-I.\" \"-Mconfigdata\" \"$dofile\" -o\"Configure\" \"".join("\" \"",@templates)."\" > \"$out.new\""; #print STDERR "DEBUG[run_dofile]: \$cmd = $cmd\n"; system($cmd); inside the function "run_dofile" I looked at the $cmd string and it looks fine to me. It fails with an error "The specified path is invalid." The only way I could get a UNC pathname to work was to map the share to a drive letter. Example: net use p: \\rdlserv\tools\nt p:\asperl-5.24.0\bin\perl ./Configure VC-WIN64A enable-weak-ssl-ciphers enable-rc4 enable-deprecated no-shared --prefix=z:\openssl\work\nt64\install -openssldir=z:\openssl\work\nt64\install -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users