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Don't forget to update the package database and apply any available upgrades:
yourpi:~$ sudo aptitude update ... yourpi:~$ sudo aptitude upgrade ...
To proceed on this project, you will also need to install the 'sc' package:
yourpi:~$ sudo aptitude install sc The following NEW packages will be installed: libncurses5{a} sc 0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 263 kB of archives. After unpacking 606 kB will be used. Do you want to continue? [Y/n/?] Get: 1 http://raspbian.mirror.constant.com/raspbian buster/main armhf libncurses5 armhf 6.1+20181013-2+deb10u2 [75.3 kB] Get: 2 http://raspbian.mirror.constant.com/raspbian buster/main armhf sc armhf 7.16-4 [188 kB] Fetched 263 kB in 10s (26.1 kB/s) Selecting previously unselected package libncurses5:armhf. (Reading database ... 98655 files and directories currently installed.) Preparing to unpack .../libncurses5_6.1+20181013-2+deb10u2_armhf.deb ... Unpacking libncurses5:armhf (6.1+20181013-2+deb10u2) ... Selecting previously unselected package sc. Preparing to unpack .../archives/sc_7.16-4_armhf.deb ... Unpacking sc (7.16-4) ... Setting up libncurses5:armhf (6.1+20181013-2+deb10u2) ... Setting up sc (7.16-4) ... Processing triggers for man-db (2.8.5-2) ... Processing triggers for libc-bin (2.28-10+rpi1) ... yourpi:~$