+ apt-get install -y cvs flex bison build-essential libmysqlclient12-dev
Reading Package Lists...
Building Dependency Tree...
cvs is already the newest version.
flex is already the newest version.
bison is already the newest version.
build-essential is already the newest version.
libmysqlclient12-dev is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
Need to get 0B of archives.
After unpacking 0B of additional disk space will be used.
Setting up cvs (1.12.9-13) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
debconf: unable to initialize frontend: Readline
debconf: (This frontend requires a controlling tty.)
debconf: falling back to frontend: Teletype
Couldn't reopen stdin(/dev/tty): No such device or address at /usr/sbin/update-inetd line 29.
dpkg: error processing cvs (--configure):
 subprocess post-installation script returned error exit status 6
Errors were encountered while processing:
 cvs