I want to simulate nucleotide substitution in R and I found this package but it is no longer on CRAN and it is discontinued.
This phyloslim ;package
This is because it depends on another package removed from CRAN. You could asked the authors to replace the dependency (there may be an alternative package).
EDIT: Looking at the GitHub repo shows that the dependency has already been removed. Not sure then why CRAN is reporting this dependency. I still suggest you contact the authors about this.
Try this :
yea I have done this it worked thanks. I should have came back to add this answer (im terrible at this). Thank you so much for doing that.