Debian："apt install build-essential" 由于未满足的依赖关系而失败

Question

使用 Debian Stretch v9.11。

我尝试安装 build-essential，但由于未满足的依赖关系而失败：

sudo apt install build-essential
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:
 build-essential : Depends: libc6-dev but it is not going to be installed or
                            libc-dev
                   Depends: g++ (>= 4:6.3) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

apt-cache 策略显示：

apt-cache policy
Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://security.debian.org/debian-security stretch/updates/non-free amd64 Packages
     release v=9,o=Debian,a=oldstable,n=stretch,l=Debian-Security,c=non-free,b=amd64
     origin security.debian.org
 500 http://security.debian.org/debian-security stretch/updates/contrib amd64 Packages
     release v=9,o=Debian,a=oldstable,n=stretch,l=Debian-Security,c=contrib,b=amd64
     origin security.debian.org
 500 http://security.debian.org/debian-security stretch/updates/main amd64 Packages
     release v=9,o=Debian,a=oldstable,n=stretch,l=Debian-Security,c=main,b=amd64
     origin security.debian.org
 500 http://deb.debian.org/debian stretch/non-free amd64 Packages
     release v=9.11,o=Debian,a=oldstable,n=stretch,l=Debian,c=non-free,b=amd64
     origin deb.debian.org
 500 http://deb.debian.org/debian stretch/contrib amd64 Packages
     release v=9.11,o=Debian,a=oldstable,n=stretch,l=Debian,c=contrib,b=amd64
     origin deb.debian.org
 500 http://deb.debian.org/debian stretch/main amd64 Packages
     release v=9.11,o=Debian,a=oldstable,n=stretch,l=Debian,c=main,b=amd64
     origin deb.debian.org

我在 /etc/apt/sources.list 中有以下内容：

# deb cdrom:[Debian GNU/Linux 9.5.0 _Stretch_ - Official amd64 DVD Binary-1 20180714-10:25]/ stretch contrib main

deb http://deb.debian.org/debian stretch main contrib non-free
deb-src http://deb.debian.org/debian stretch main contrib non-free

# deb http://deb.debian.org/debian stretch-updates main
# deb-src http://deb.debian.org/debian stretch-updates main


# deb http://deb.debian.org/debian-security/ stretch/updates main
# deb-src http://deb.debian.org/debian-security/ stretch/updates main

deb http://security.debian.org/debian-security stretch/updates main contrib non-free
deb-src http://security.debian.org/debian-security stretch/updates main contrib non-free

# add backports
# deb http://ftp.debian.org/debian stretch-backports main


# stretch-updates, previously known as 'volatile'
# A network mirror was not selected during install.  The following entries
# are provided as examples, but you should amend them as appropriate
# for your mirror of choice.
#
# deb http://deb.debian.org/debian/ stretch-updates main contrib
# deb-src http://deb.debian.org/debian/ stretch-updates main contrib

EDIT1：apt-cache policy libc6-dev 显示：

apt-cache policy libc6-dev
libc6-dev:
  Installed: (none)
  Candidate: 2.24-11+deb9u4
  Version table:
     2.24-11+deb9u4 500
        500 http://deb.debian.org/debian stretch/main amd64 Packages
     2.24-11+deb9u1 500
        500 http://security.debian.org/debian-security stretch/updates/main amd64 Packages

apt-cache 策略 g++ 显示：

apt-cache policy g++
g++:
  Installed: (none)
  Candidate: 4:6.3.0-4
  Version table:
     4:6.3.0-4 500
        500 http://deb.debian.org/debian stretch/main amd64 Packages

编辑2： 我有 deb http://ftp.de.debian.org/debian buster main 在 /etc/apt/sources.list.d/.mc.list

我记得，有一次我不得不安装一个更新的 mc，它有特定的错误修复。它仅在 Debian Buster 发行版中可用。

编辑3：

apt update
Get:1 http://security.debian.org/debian-security stretch/updates InRelease [94.3 kB]
Ign:2 http://deb.debian.org/debian stretch InRelease
Hit:3 http://deb.debian.org/debian stretch Release
Fetched 94.3 kB in 1s (69.7 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.

apt upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

apt-get install --fix-broken
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

如何修复未满足的依赖项？

Answer 1

最后我在另一个论坛得到了帮助： https://serverfault.com/a/1004951/302842

这是降级有问题的软件包的解决方案：

apt install libc6/stretch libc6-dev/stretch libc-dev-bin/stretch libc-bin/stretch locales/stretch sudo/stretch

降级成功！

Debian："apt install build-essential" 由于未满足的依赖关系而失败

Debian: "apt install build-essential" fails because of unmet dependencies

dependencies

debian

installation

debian-stretch

aptitude