要运行qdap，为什么我必须重复安装依赖关系= T的gtools？

Question

我已经安装了软件包qdap [2.2.0]和gtools [Ver。 3.4.1] qdap要求的。但是使用library()加载它们会失败，直到我每次使用参数dependencies = TRUE重新安装gtools。我做错了什么而不理解？

> library(qdap)
Error in library.dynam(lib, package, package.lib) : 
  DLL ‘gtools’ not found: maybe not installed for this architecture?
In addition: Warning message:
package ‘qdap’ was built under R version 3.1.2 
Error: package or namespace load failed for ‘qdap’
> library(gtools)
Error in library.dynam(lib, package, package.lib) : 
  DLL ‘gtools’ not found: maybe not installed for this architecture?
In addition: Warning message:
package ‘gtools’ was built under R version 3.1.2 
Error: package or namespace load failed for ‘gtools’
> 
> install.packages("gtools", dependencies = T)