我要使用以下命令将mingw-w64-x86_64-webkitgtk3软件包安装到MSYS2中：
ridk exec pacman -S mingw-w64-x86_64-webkitgtk3
但是我收到此错误：
error: target not found: mingw-w64-x86_64-webkitgtk3
我的mirrorlist.mingw64文件是这样的：
##
## 64-bit Mingw-w64 repository mirrorlist
##
## Primary
## msys2.org
Server = http://repo.msys2.org/mingw/x86_64/
Server = https://sourceforge.net/projects/msys2/files/REPOS/MINGW/x86_64/
Server = http://www2.futureware.at/~nickoe/msys2-mirror/mingw/x86_64/
Server = https://mirror.yandex.ru/mirrors/msys2/mingw/x86_64/
我查看了http://repo.msys2.org/mingw/x86_64/地址，并在那里看到了这个包裹。因此我无法理解问题。会是什么？
顺便说一句，我运行了ridk exec pacman -Syuu命令并获得了输出
:: Synchronizing package databases...
mingw32 is up to date
mingw64 is up to date
msys is up to date
:: Starting core system upgrade...
there is nothing to do
:: Starting full system upgrade...
there is nothing to do