我试图通过devtools :: install_github()安装包，但我得到了一个非常错误 . 救命？

>install_github("kevinwolz/hisafer")

Downloading GitHub repo kevinwolz/hisafer@master

from URL https://api.github.com/repos/kevinwolz/hisafer/zipball/master

Installing hisafer

[这里，5个包依赖项(dplyr，tidyr，purrr，ggplot2，lubridate)会自动成功安装，但我已经将文本输出了]

"C:/Users/wolzkevi/DOCUME~1/R/R-34~1.3/bin/x64/R" --no-site-file --no-environ --no-save \

--no-restore --quiet CMD INSTALL \

"C:/Users/wolzkevi/AppData/Local/Temp/Rtmpg5OyD6/devtools28843ed4c0a/kevinwolz-hisafer-bf69883" \

--library="C:/Users/wolzkevi/Documents/R/R-3.4.3/library" --install-tests

* installing *source* package 'hisafer' ...

** R

** inst

** preparing package for lazy loading

Error : '' does not exist in current working directory ('C:/Users/wolzkevi/AppData/Local/Temp/Rtmpg5OyD6/devtools28843ed4c0a/kevinwolz-hisafer-bf69883').

Error : unable to load R code in package 'hisafer'

ERROR: lazy loading failed for package 'hisafer'

* removing 'C:/Users/wolzkevi/Documents/R/R-3.4.3/library/hisafer'

In R CMD INSTALL

Installation failed: Command failed (1)

这里的关键错误似乎是“错误：''在当前工作目录中不存在” . 有谁知道为什么会这样？我的软件包构建/设置方式是否会导致问题？我不能从GitHub下载时从源代码安装包，这让我相信在GitHub进程中发生了一些奇怪的事情 .

会话信息：

R version 3.4.3 (2017-11-30)

Platform: x86_64-w64-mingw32/x64 (64-bit)

Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

locale:

[1] LC_COLLATE=French_France.1252 LC_CTYPE=French_France.1252

[3] LC_MONETARY=French_France.1252 LC_NUMERIC=C

[5] LC_TIME=French_France.1252

attached base packages:

[1] stats graphics grDevices utils datasets methods base

other attached packages:

[1] devtools_1.13.4

loaded via a namespace (and not attached):

[1] httr_1.3.1 compiler_3.4.3 R6_2.2.2 tools_3.4.3 withr_2.1.1 curl_3.1

[7] memoise_1.1.0 knitr_1.19 git2r_0.21.0 digest_0.6.15