添加 Multilib源

/etc/pacman.conf文件中添加：

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[multilib]
Include = /etc/pacman.d/mirrorlist

同步 库

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$ sudo pacman -Syy

安装 Steam

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$ sudo pacman -S steam

安装 支持库

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$ sudo pacman -S steam-libs

禁用 自带库

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$ sudo rm ~/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libstdc++.so.6 && find ~/.steam/root/ -name "libgpg-error.so*" -print -delete
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$ export STEAM_RUNTIME=0

安装 Steam字体

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$ yaourt -S steam-fonts