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### Running command:
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###   /home/biocbuild/R/R/bin/R CMD build --keep-empty-dirs --no-resave-data fastreeR
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* checking for file ‘fastreeR/DESCRIPTION’ ... OK
* preparing ‘fastreeR’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘fastreeR_vignette.Rmd’ using rmarkdown
VCF2ISTATS
Num of Ind = 150
VCF2DIST
150 0
VCF2TREE
VCF2TREE

Quitting from fastreeR_vignette.Rmd:306-333 [unnamed-chunk-12]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error in `get()`:
! object 'ggtree' not found
---
Backtrace:
    ▆
 1. ├─base::print(p)
 2. └─ggtree:::print.ggtree(p)
 3.   └─ggtree:::is_ggtree_interactive()
 4.     └─yulab.utils::get_cache_item("ggtree")
 5.       └─base::get(item, envir = env, inherits = FALSE)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'fastreeR_vignette.Rmd' failed with diagnostics:
object 'ggtree' not found
--- failed re-building ‘fastreeR_vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘fastreeR_vignette.Rmd’

Error: Vignette re-building failed.
Execution halted