After installation, please read the help page:
help("fakemake-package", package = "fakemake")#> Mock the Unix Make Utility
#> 
#> Description:
#> 
#>      Use R as a minimal build system. This might come in handy if you
#>      are developing R packages and can not use a proper build system.
#>      Stay away if you can (use a proper build system).
#> 
#> Details:
#> 
#>      You will find the details in
#>      'vignette("An_Introduction_to_fakemake", package = "fakemake")'.You can install fakemake from gitlab with:
if (! require("remotes")) install.packages("remotes")
remotes::install_gitlab("fvafrcu/fakemake")