You can install the released version of SRxgboost from CRAN with:
devtools::install_github("samuelreuther/SRxgboost")
install.packages("~/data/shared/CH00RHU/Libraries/SRxgboost_0.6.1.tar.gz",
repos = NULL, type = "source", dependencies = TRUE)
library(SRxgboost)