R包安装错误：Warning in system("sh ./configure.win") : 'sh' not found

spatstat     (2.1-0      -> 2.2-0     ) [CRAN]

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ERROR: dependency ‘rsvd‘ is not available for package ‘Seurat‘
* removing ‘C:/Program Files/R/R-3.6.0/library/Seurat‘
Warning messages:
1: In missing_devel_warning(pkgdir) :
  Package Seurat has compiled code, but no suitable compiler(s) were found. Installation will likely fail.
  Install Rtools (https://cran.r-project.org/bin/windows/Rtools/).Then use the pkgbuild package, or make sure that Rtools in the PATH.
2: In i.p(...) :
  installation of package ‘C:/Users/ADMINI~1/AppData/Local/Temp/Rtmpw9bH6E/remotes3878318e2d53/Seurat’ had non-zero exit status