The recommendation is to install from CRAN.
install.packages("bmp")
You can, however, download the tar ball, and
run R CMD INSTALL
on it, or use the
devtools package to install the development
version:
if (!require("remotes")) install.packages("remotes")
::install_github("jefferis/bmp") remotes
NB Windows users need Rtools and devtools to install this way.