Установка gcc-8 g ++ - 8 на ubuntu 18.04

Привет, я пробовал установить gcc-8 и g ++ - 8. Это дает ошибку ниже

$ sudo apt-get install gcc-8 g++-8 -y

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:
 g++-8 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is to be installed
         Depends: libstdc++-8-dev (= 8-20180414-1ubuntu2) but it is not going to be installed
 gcc-8 : Depends: cpp-8 (= 8-20180414-1ubuntu2) but it is not going to be installed
         Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is to be installed
         Depends: libgcc-8-dev (= 8-20180414-1ubuntu2) but it is not going to be installed
         Recommends: libc6-dev (>= 2.13-0ubuntu6) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

. Я пробовал следующие способы, но дает ту же ошибку - Установите gcc на ubuntu18

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-8 g++-8
gcc-8 --version

Также пытались установить build-essential , но выдавала ту же ошибку. Мы будем очень благодарны за любые предложения или помощь. Заранее спасибо

gcc-8 сломанные пакеты bionic arm64

С Aptitude также не устанавливается-

sudo aptitude install gcc-8
The following NEW packages will be installed:
  cpp-8{ab} gcc-8{b} libasan5{ab} libatomic1{ab} libc-dev-bin{a} 
  libc6-dev{ab} libgcc-8-dev{ab} libitm1{ab} liblsan0{ab} libmpx2{ab} 
  libquadmath0{ab} libtsan0{ab} libubsan1{ab} linux-libc-dev{a} 
  manpages-dev{a} 
0 packages upgraded, 15 newly installed, 0 to remove and 0 not upgraded.
Need to get 24.4 MB of archives. After unpacking 99.9 MB will be used.
The following packages have unmet dependencies:
 libmpx2 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libc6-dev : Depends: libc6 (= 2.27-3ubuntu1) but 2.27-3ubuntu1.2 is installed
 cpp-8 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libitm1 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libasan5 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libquadmath0 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libgcc-8-dev : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libtsan0 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libubsan1 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 gcc-8 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 liblsan0 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
 libatomic1 : Depends: gcc-8-base (= 8-20180414-1ubuntu2) but 8.4.0-1ubuntu1~18.04 is installed
The following actions will resolve these dependencies:

      Keep the following packages at their current version:
1)      cpp-8 [Not Installed]                              
2)      gcc-8 [Not Installed]                              
3)      libasan5 [Not Installed]                           
4)      libatomic1 [Not Installed]                         
5)      libc6-dev [Not Installed]                          
6)      libgcc-8-dev [Not Installed]                       
7)      libitm1 [Not Installed]                            
8)      liblsan0 [Not Installed]                           
9)      libmpx2 [Not Installed]                            
10)     libquadmath0 [Not Installed]                       
11)     libtsan0 [Not Installed]                           
12)     libubsan1 [Not Installed]                          



Accept this solution? [Y/n/q/?] y
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.