Error(s) in re-building vignettes:
  ...
--- re-building ‘v0-overview.Rmd’ using rmarkdown
--- finished re-building ‘v0-overview.Rmd’

--- re-building ‘v1-capture-first.Rmd’ using rmarkdown
--- finished re-building ‘v1-capture-first.Rmd’

--- re-building ‘v2-capture-all.Rmd’ using rmarkdown
--- finished re-building ‘v2-capture-all.Rmd’

--- re-building ‘v3-capture-melt.Rmd’ using rmarkdown
Failed with error:  'there is no package called 'tidyr''
--- finished re-building ‘v3-capture-melt.Rmd’

--- re-building ‘v4-comparisons.Rmd’ using rmarkdown
Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'reshape2''
Failed with error:  'there is no package called 'tidyr''
** Processing: /home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/nc.Rcheck/vign_test/nc/vignettes/v4-comparisons_files/figure-html/unnamed-chunk-19-1.png
288x288 pixels, 8 bits/pixel, 255 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 7166 bytes
Input file size = 8021 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 6754
  zc = 9  zm = 8  zs = 1  f = 0
  zc = 1  zm = 8  zs = 2  f = 0
  zc = 9  zm = 8  zs = 3  f = 0
  zc = 9  zm = 8  zs = 0  f = 5
  zc = 9  zm = 8  zs = 1  f = 5
  zc = 1  zm = 8  zs = 2  f = 5
  zc = 9  zm = 8  zs = 3  f = 5
                               
Selecting parameters:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 6754

Output IDAT size = 6754 bytes (412 bytes decrease)
Output file size = 6832 bytes (1189 bytes = 14.82% decrease)

Failed with error:  'there is no package called 'tidyr''
Failed with error:  'there is no package called 'tidyr''

Quitting from lines 671-687 [unnamed-chunk-21] (v4-comparisons.Rmd)
Error: processing vignette 'v4-comparisons.Rmd' failed with diagnostics:
there is no package called 'tidyr'
--- failed re-building ‘v4-comparisons.Rmd’

--- re-building ‘v5-helpers.Rmd’ using rmarkdown
--- finished re-building 'v5-helpers.Rmd'

--- re-building ‘v6-engines.Rmd’ using rmarkdown
--- finished re-building ‘v6-engines.Rmd’

--- re-building ‘v7-capture-glob.Rmd’ using rmarkdown
Failed with error:  'there is no package called 'arrow''
Failed with error:  'there is no package called 'arrow''
Failed with error:  'there is no package called 'arrow''
--- finished re-building ‘v7-capture-glob.Rmd’

SUMMARY: processing the following file failed:
  ‘v4-comparisons.Rmd’

Error: Vignette re-building failed.
Execution halted