CRAN 检查:警告插图引擎 knitr::rmarkdown 不可用

CRAN check: warning vignette engine knitr::rmarkdown is not available

我第一次尝试在我的包裹中添加一些插图。在我的电脑上一切正常。没有警告,没有错误。然后我将它上传到 CRAN windows builder

devtools::check_win_release()

我收到了关于小插图的警告:

* checking re-building of vignette outputs ... [7s] WARNING
Error in re-building vignettes:
  ...
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  The vignette engine knitr::rmarkdown is not available, because the rmarkdown package is not installed. Please install it.
Failed with error:  'there is no package called 'rmarkdown''
Quitting from lines 172-178 (las.Rmd) 
Error: processing vignette 'las.Rmd' failed with diagnostics:
cannot open the connection
Execution halted

我认为这个问题与包裹的内容无关。我可以假设这是一个 "ok" 警告吗?我可以修复它吗?

我的 DESCRIPTION 文件包含:

Suggests: knitr
VignetteBuilder: knitr

您需要在建议中添加 rmarkdown