Hello all,

there have been a few reports of problems with installing phytools or
phangorn and you may see something like this:

devtools::install_github("liamrevell/phytools")
Downloading GitHub repo liamrevell/phytools@master
Installing phytools
Skipping 1 packages not available: Biostrings
...
...
Error: Command failed (1)

Recently I updated phangorn (now version 2.0.1), but there were also
updates of R (3.2.3) and also Bioconductor. All this seem to have
contributed to this problem. install.packages() and install.github() do not
always get bioconductor dependencies right (e.g.
https://github.com/hadley/devtools/issues/700).

To solve the problem simply install the Biostrings package first

source("http://bioconductor.org/biocLite.R";)
biocLite("Biostrings")

and in a fresh session of R try again to install phytools or phangorn.

If you have installed any bioconductor packages, chances are that you also
installed Biostrings package are pretty high.

Regards,
Klaus



-- 
Klaus Schliep
Postdoctoral Fellow
Revell Lab, University of Massachusetts Boston

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