我正在构建一个R包，并在使用devtools :: check（）测试该包时，测试到达安装阶段时出现错误，提示：
Error: .onLoad failed in loadNamespace() for 'pillar', details:
call: utils::packageVersion("vctrs")
error: there is no package called 'vctrs'
Execution halted
ERROR: lazy loading failed for package
我的描述文件中没有提到支柱和vctrs，因此它们必须是我所依赖的其他软件包的依赖。支柱和vctrs都已安装，我也尝试过重新安装它们。它们存储在第一个.libPath条目中。我尝试按照mfox9 here的建议从github安装支柱，但这对我来说失败了，给出了以下错误：
> devtools::install_github("r-lib/pillar")
Downloading GitHub repo r-lib/pillar@master
√ checking for file 'C:\Users\DESCRIPTION' (337ms)
- preparing 'pillar': (664ms)
√ checking DESCRIPTION meta-information ...
- installing the package to process help pages
- checking for LF line-endings in source and make files and shell scripts (8.5s)
- checking for empty or unneeded directories
- building 'pillar_1.4.2.9001.tar.gz'
Installing package into ‘Z:/’
(as ‘lib’ is unspecified)
The filename, directory name, or volume label syntax is incorrect.
Error: Failed to install 'pillar' from GitHub:
(converted from warning) installation of package ‘C:/Users/Temp/RtmpgjFfZl/file32586b634e28/pillar_1.4.2.9001.tar.gz’ had non-zero exit status
（注意：z：/是我正确的R库地址）
有人可以帮忙吗？
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> sessionInfo()
R version 3.6.1 (2019-07-05)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 15063)
Matrix products: default
locale:
[1] LC_COLLATE=English_United Kingdom.1252 LC_CTYPE=English_United Kingdom.1252
[3] LC_MONETARY=English_United Kingdom.1252 LC_NUMERIC=C
[5] LC_TIME=English_United Kingdom.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] pillar_1.4.2
loaded via a namespace (and not attached):
[1] Rcpp_1.0.2 rstudioapi_0.10 magrittr_1.5 usethis_1.5.1
[5] devtools_2.2.0 pkgload_1.0.2 R6_2.4.0 rlang_0.4.0
[9] tools_3.6.1 pkgbuild_1.0.5 DT_0.8 packrat_0.5.0
[13] sessioninfo_1.1.1 cli_1.1.0 withr_2.1.2 remotes_2.1.0
[17] htmltools_0.3.6 ellipsis_0.2.0.1 assertthat_0.2.1 digest_0.6.20
[21] rprojroot_1.3-2 crayon_1.3.4 processx_3.4.1 callr_3.3.1
[25] fs_1.3.1 htmlwidgets_1.3 ps_1.3.0 curl_4.0
[29] testthat_2.2.1 glue_1.3.1 memoise_1.1.0 compiler_3.6.1
[33] desc_1.2.0 backports_1.1.4 prettyunits_1.0.2
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