Package: apt
Version: 1.8.2
Invoke `apt-get build-dep -a arm64 ffmpeg' report `cleancss:arm64 is not
installable', cleancss:all should met.
=====
$ sudo apt list cleancss
Listing... Done
cleancss/stable,stable 4.2.1+~4.2.1-1 all
$ sudo apt list node-less
Listing... Done
node-less/stable,stable 1.6.3~dfsg-3 all
$ sudo apt-get build-dep -a arm64 ffmpeg
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
builddeps:ffmpeg:arm64 : Depends: cleancss:arm64 but it is not installable
Depends: node-less:arm64 but it is not installable
=====
cleancss and node-less both are architecture independent, should meet
dependencies.
I am using Debian 10.3 amd64 in docker.