Невозможно установить два пакета за один раз [закрыто]

Я могу установить два пакета по отдельности, но всякий раз, когда я пытаюсь установить их за один раз, мне говорят, что у них есть «неудовлетворенные зависимости».

Это свежая установка Ubuntu (как надежная, так и бионическая), поэтому не должно быть в неисправном состоянии.

Это работает (но мне действительно нужно установить их за один раз):

apt-get install gcc-multilib -y && apt-get install gcc-aarch64-linux-gnu -y && echo "Works!
[...]
Works!

Ошибка:

apt-get install gcc-aarch64-linux-gnu gcc-multilib -y

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:
 gcc-aarch64-linux-gnu : Depends: gcc-7-aarch64-linux-gnu (>= 7.3.0-12~) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

Вывод из aptitude :

aptitude install gcc-aarch64-linux-gnu gcc-multilib
The following NEW packages will be installed:
  binutils{a} binutils-aarch64-linux-gnu{a} binutils-common{a} binutils-x86-64-linux-gnu{a} cpp{a} cpp-7{a} 
  cpp-7-aarch64-linux-gnu{a} cpp-aarch64-linux-gnu{a} gcc{a} gcc-7{a} gcc-7-aarch64-linux-gnu{ab} 
  gcc-7-aarch64-linux-gnu-base{a} gcc-7-base{a} gcc-7-cross-base{a} gcc-7-multilib{a} gcc-8-cross-base{a} 
  gcc-aarch64-linux-gnu gcc-multilib{b} lib32asan4{a} lib32atomic1{a} lib32cilkrts5{a} lib32gcc-7-dev{a} 
  lib32gcc1{a} lib32gomp1{a} lib32itm1{a} lib32mpx2{a} lib32quadmath0{a} lib32stdc++6{a} lib32ubsan0{a} libasan4{a} 
  libasan4-arm64-cross{a} libatomic1{a} libatomic1-arm64-cross{a} libbinutils{a} libc-dev-bin{a} 
  libc6-arm64-cross{a} libc6-dev{a} libc6-dev-arm64-cross{a} libc6-dev-i386{a} libc6-dev-x32{a} libc6-i386{a} 
  libc6-x32{a} libcc1-0{a} libcilkrts5{a} libgcc-7-dev{a} libgcc-7-dev-arm64-cross{a} libgcc1-arm64-cross{a} 
  libgomp1{a} libgomp1-arm64-cross{a} libisl19{a} libitm1{a} libitm1-arm64-cross{a} liblsan0{a} 
  liblsan0-arm64-cross{a} libmpc3{a} libmpfr6{a} libmpx2{a} libquadmath0{a} libstdc++6-arm64-cross{a} libtsan0{a} 
  libtsan0-arm64-cross{a} libubsan0{a} libubsan0-arm64-cross{a} libx32asan4{a} libx32atomic1{a} libx32cilkrts5{a} 
  libx32gcc-7-dev{a} libx32gcc1{a} libx32gomp1{a} libx32itm1{a} libx32quadmath0{a} libx32stdc++6{a} libx32ubsan0{a} 
  linux-libc-dev{a} linux-libc-dev-arm64-cross{a} manpages{a} manpages-dev{a} 
0 packages upgraded, 77 newly installed, 0 to remove and 0 not upgraded.
Need to get 65.6 MB of archives. After unpacking 267 MB will be used.
The following packages have unmet dependencies:
 gcc-multilib : Conflicts: gcc-7-aarch64-linux-gnu but 7.3.0-16ubuntu3cross1 is to be installed
 gcc-7-aarch64-linux-gnu : Conflicts: gcc-multilib but 4:7.3.0-3ubuntu2 is to be installed
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     gcc-7-aarch64-linux-gnu [Not Installed]            
2)     gcc-aarch64-linux-gnu [Not Installed]              



Accept this solution? [Y/n/q/?] n
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     gcc-multilib [Not Installed]                       

     Leave the following dependencies unresolved:         
2)     libc6-dev-i386 recommends gcc-multilib             
3)     libc6-dev-x32 recommends gcc-multilib              



Accept this solution? [Y/n/q/?] q
Abandoning all efforts to resolve these dependencies.
Abort.