libgnutls28-dev：apt 正在搜索错误的文件？

Question

我在 debian buster 上安装 libgnutls28-dev 包时遇到问题，apt 抛出以下内容：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Suggested packages:
  gnutls-bin gnutls-doc
The following NEW packages will be installed:
  libgnutls28-dev
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,086 kB of archives.
After this operation, 4,417 kB of additional disk space will be used.
Err:1 http://deb.debian.org/debian buster/main amd64 libgnutls28-dev amd64 3.6.7-4
  404  Not Found [IP: 151.101.220.204 80]
E: Failed to fetch http://deb.debian.org/debian/pool/main/g/gnutls28/libgnutls28-dev_3.6.7-4_amd64.deb  404  Not Found [IP: 151.101.220.204 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

让我烦恼的是这个包在 http://deb.debian.org/debian/pool/main/g/gnutls28/libgnutls28-dev_3.6.7-4+deb10u2_amd64.deb 可用，并且出于某种原因 apt 正在寻找 libgnutls28-dev_3.6.7-4_amd64.deb 而不是 libgnutls28-dev_3.6.7-4+deb10u2_amd64.deb。

我尝试使用特定版本运行 apt install libgnutls28-dev=3.6.7-4+deb10u2 并得到以下信息：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Version '3.6.7-4+deb10u2' for 'libgnutls28-dev' was not found

问题是这是从哪里来的？这是 apt 的问题吗？还是 gnutls28 误导了相关性？或者首先应该有一个文件 libgnutls28-dev_3.6.7-4_amd64.deb ？

[编辑]

根据 Knud 的评论添加：

根据 apt 系统是最新的：

apt update

Hit:1 http://deb.debian.org/debian buster InRelease
Hit:2 http://deb.debian.org/debian buster-updates InRelease
Hit:3 http://security.debian.org/debian-security buster/updates InRelease            
Hit:4 http://deb.debian.org/debian buster-backports InRelease                        
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.

我向其中一位软件包维护者确认，可用版本 _3.6.7-4+deb10u2 是最新版本， apt 应该知道这一点，但是:

apt-cache policy libgnutls28-dev

libgnutls28-dev:
  Installed: (none)
  Candidate: 3.6.7-4
  Version table:
     3.6.7-4 500
        500 http://deb.debian.org/debian buster/main amd64 Packages

所以这是一个 apt 问题。出于某种原因 apt，即使拥有超级牛的力量，也陷入了过时的状态。任何指导将不胜感激。

Answer 1

找到解决方案，感谢 Andreas Metzler 的指导。

镜像显然卡在了过时的包索引中。我正在使用 deb.debian.org，据我所知，它会将 apt 重定向到附近的服务器。我更新了 /etc/apt/ 中的 sources.list 文件，因此它们现在指向一个固定的附近服务器并且一切正常。

libgnutls28-dev：apt 正在搜索错误的文件？

libgnutls28-dev: apt is searching for the wrong file?

linux

apt

gnutls

debian-buster