R包安装失败 package ‘mculst’ is not available (for R version 4.0.0)

错误代码:

WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:

https://cran.rstudio.com/bin/windows/Rtools/
Warning in install.packages :
  package ‘mculst’ is not available (for R version 4.0.0)

使用各种方法后仍旧安装不了
然后发现了一个傻瓜办法

  1. 点击install
    R包安装失败 package ‘mculst’ is not available (for R version 4.0.0)_第1张图片
  2. 如图R包安装失败 package ‘mculst’ is not available (for R version 4.0.0)_第2张图片

为什么明明语句都一样都是install.packages() 怎么就…emmm

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