I have a Docker image with Ubuntu and I need to update CPAN-2.28 to latest version. I tried to run:

RUN apt-get install libyaml-syck-perl libtemplate-perl libwww-perl
RUN perl -MCPAN -e shell

But I get error:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package libyaml-syck-perl

Do you know what is the proper way to make the update?

I have a Docker image with Ubuntu and I need to update CPAN-2.28 to latest version. I tried to run:

RUN apt-get install libyaml-syck-perl libtemplate-perl libwww-perl
RUN perl -MCPAN -e shell

But I get error:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package libyaml-syck-perl

Do you know what is the proper way to make the update?

• docker
• ubuntu
• cpan

• Which version of Ubuntu? Please provide an image minimal reproducible example, including your FROM clause. – β.εηοιτ.βε Commented Mar 5 at 17:43

1 Answer 1

Try adding the universe repository on top, which provides libyaml-syck-perl ...

RUN sudo add-apt-repository universe