Homebrew 升级 R 包，出现提示： Not running post_install……

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Homebrew 升级 R 包。

ChadeMacBook-Pro-5:~ pig$ brew upgrade r Updating Homebrew... ==> Upgrading 1 outdated package, with result: r 3.4.0_1 -> 3.5.0_1 ==> Upgrading r ==> Downloading https://cran.r-project.org/src/base/R-3/R-3.5.0.tar.gz ######################################################################## 100.0% ==> ./configure --prefix=/usr/local/Cellar/r/3.5.0_1 --enable-memory-profiling - ==> make

==> make install ==> make ==> make install ==> Not running post_install as we're building a bottle You can run it manually using brew postinstall r 🍺 /usr/local/Cellar/r/3.5.0_1: 2,114 files, 56.4MB, built in 10 minutes 41 seconds

请问：Not running post_install as we're building a bottle You can run it manually using brew postinstall r 这个是什么意思？谢谢了。