如何解決mingw-get下載報錯

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 m

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