when I tried to upgrade my kali linux to its 2020 version, its always returns with error code:

dpkg: error processing archive /var/cache/apt/archives/kali-themes_2020.2.1_all.deb (--unpack):
dpkg: error processing archive /var/cache/apt/archives/ruby-progressbar_1.10.1-1_all.deb (--unpack): 
trying to overwrite '/usr/lib/ruby/vendor_ruby/ruby-progressbar/base.rb' which is also in package ruby-ruby-progressbar 1.6.0-0kali1
E: Sub-process /usr/bin/dpgk returned with error code (1)

and when I finished doing sudo dpkg --configure -a, it said :

**dpkg**: dependency problems prevent configuration of ruby-cms-scanner:
ruby-cms-scanner depends on ruby-progressbar (>=1.9.0); however:
pacakge ruby-progressbar is not installed

**dpkg**: error processing package ruby-cms-scanner(--configure):
dependency problems - leaving unconfigured

**dpkg**: dependency problems prevent configuration of gnome-theme-kali:
gnome-theme-kali depends on kali-themes; however:
package kali-themes is not installed.

**dpkg**: error processing package gnome-theme-kali (--configure):
dependency problems - leaving unconfigured

**dpkg**: dependency problems prevent configuration of wpscan:
wpscan depends on ruby-cms-scanner; however:
package ruby-cms-scanner is not configured yet.

**dpkg**: error processing package wpscan (--configure):
dependency problem - leaving unconfigured

    errors were encountered while processing:

I have tried: sudo apt-get install -f sudo apt-get autoclean sudo apt-get install aptitude(somehow I cant install it) sudo apt-get -u dist-upgrade

and I cant even purge or remove theme

what should I do? I used Virtual Box to run my Kali too. Please give me step by step of how to solve this error.

  • 1
    Are you using kali as a general purpose desktop operating system? Apr 5, 2020 at 12:25
  • 1
    I use it for my collegue studies, so this os is very important to me, for pen test, hacking and stuff Apr 5, 2020 at 12:36
  • 1
    Install Debian, for a reliable desktop system. For you pen-test stuff, just re-install kali. Apr 5, 2020 at 12:38
  • 1
    omg so are you saying I cant save this os and I should make a new one?there should be another way, I mean, all of my progress is kinda in there... Apr 5, 2020 at 12:39
  • 1
    I am not saying that it can't be done. But please read this unix.meta.stackexchange.com/q/5316/4778 Apr 5, 2020 at 12:45

1 Answer 1


I had the exact same thing, run:

sudo dpkg -P ruby-ruby-progressbar

and then continued the installation with:

sudo apt --fix-broken install -y

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