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### Running command:
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###   /home/biocbuild/R/R/bin/R CMD build --keep-empty-dirs --no-resave-data BiocFileCache
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* checking for file ‘BiocFileCache/DESCRIPTION’ ... OK
* preparing ‘BiocFileCache’:
* checking DESCRIPTION meta-information ... OK
* installing the package to build vignettes
* creating vignettes ... ERROR
--- re-building ‘BiocFileCache.Rmd’ using rmarkdown
--- finished re-building ‘BiocFileCache.Rmd’

--- re-building ‘BiocFileCache_Troubleshooting.Rmd’ using rmarkdown
--- finished re-building ‘BiocFileCache_Troubleshooting.Rmd’

--- re-building ‘BiocFileCache_UseCases.Rmd’ using rmarkdown

Quitting from BiocFileCache_UseCases.Rmd:191-221 [ensemblremote]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
<error/rlang_error>
Error:
! package or namespace load failed for 'rtracklayer':
 class "Seqinfo" is not exported by 'namespace:GenomeInfoDb'
---
Backtrace:
    ▆
 1. ├─base::suppressPackageStartupMessages(...)
 2. │ └─base::withCallingHandlers(expr, packageStartupMessage = function(c) tryInvokeRestart("muffleMessage"))
 3. └─base::library(rtracklayer)
 4.   └─base::tryCatch(...)
 5.     └─base (local) tryCatchList(expr, classes, parentenv, handlers)
 6.       └─base (local) tryCatchOne(expr, names, parentenv, handlers[[1L]])
 7.         └─value[[3L]](cond)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Error: processing vignette 'BiocFileCache_UseCases.Rmd' failed with diagnostics:
package or namespace load failed for 'rtracklayer':
 class "Seqinfo" is not exported by 'namespace:GenomeInfoDb'
--- failed re-building ‘BiocFileCache_UseCases.Rmd’

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

Error: Vignette re-building failed.
Execution halted