install: bison-2.4.2-1-msys-1.0.13-doc.tar.lzma
mingw-get-gui: *** ERROR *** required package file is not available
mingw-get-gui: *** ERROR *** cannot install bison-2.4.2-1-msys-1.0.13-doc.tar.lzma
mingw-get-gui: *** ERROR *** due to previous download failure
遇到这样的问题很大概率是被墙了
使用梯子即可
以lantern为例
打开设置->高级设置,框选"代理全部流量"
再次运行mingw-get即可