在 Yakkety 上：
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.10
Release: 16.10
Codename: yakkety
我似乎无法安装libgmp3-dev：
$ sudo apt-get install libgmp3-dev
[sudo] password for exarkun:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package libgmp3-dev is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'libgmp3-dev' has no installation candidate
显然至少还有一个人可以在 16.10 上安装此软件包。正如您所看到的，我在安装 fastecdsa 时遇到了麻烦，这似乎与缺少 libgmp3-dev 有关。
这是我的sources.list（减去注释行）：
deb http://mirror.nodesdirect.com/ubuntu/ yakkety-updates main restricted
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety-updates main restricted
deb http://mirror.nodesdirect.com/ubuntu/ yakkety universe
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety universe
deb http://mirror.nodesdirect.com/ubuntu/ yakkety-updates universe
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety-updates universe
deb http://mirror.nodesdirect.com/ubuntu/ yakkety multiverse
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety multiverse
deb http://mirror.nodesdirect.com/ubuntu/ yakkety-updates multiverse
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety-updates multiverse
deb http://mirror.nodesdirect.com/ubuntu/ yakkety-backports main restricted universe multiverse
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ yakkety-security universe multiverse main restricted
deb-src http://security.ubuntu.com/ubuntu/ yakkety-security universe multiverse main restricted
mirror.nodesdirect.com来自https://launchpad.net/ubuntu/+archivemirrors（之前我使用普林斯顿数学镜，结果相同）。
为什么我无法安装这个软件包？
答案1
从您的 sources.list 文件中，我发现您缺少main存储库的组件。将这两行添加到文件中sources.list，然后使用以下代码执行包索引更新：sudo apt update
deb http://mirror.nodesdirect.com/ubuntu/ yakkety main
deb-src http://mirror.nodesdirect.com/ubuntu/ yakkety main
然后照常安装包
它哪儿也没去。也可用于 yakkety。http://packages.ubuntu.com/yakkety/libgmp3-dev
检查您的软件源是否已启用相应的软件源。