Error(s) in re-building vignettes:
  ...
--- re-building ‘passt.Rmd’ using rmarkdown
** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/passt.Rcheck/vign_test/passt/vignettes/passt_files/figure-html/unnamed-chunk-4-1.png
480x336 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 4797 bytes
Input file size = 5655 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 4089
  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 = 4089

Output IDAT size = 4089 bytes (708 bytes decrease)
Output file size = 4167 bytes (1488 bytes = 26.31% decrease)

** Processing: /home/hornik/tmp/R.check/r-release-gcc/Work/PKGS/passt.Rcheck/vign_test/passt/vignettes/passt_files/figure-html/unnamed-chunk-5-1.png
480x336 pixels, 8 bits/pixel, 256 colors in palette
Reducing image to 8 bits/pixel, grayscale
Input IDAT size = 5980 bytes
Input file size = 6838 bytes

Trying:
  zc = 9  zm = 8  zs = 0  f = 0		IDAT size = 5387
  zc = 9  zm = 8  zs = 1  f = 0		IDAT size = 5377
  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 = 1  f = 0		IDAT size = 5377

Output IDAT size = 5377 bytes (603 bytes decrease)
Output file size = 5455 bytes (1383 bytes = 20.23% decrease)


Quitting from lines 116-119 [unnamed-chunk-10] (passt.Rmd)
Error: processing vignette 'passt.Rmd' failed with diagnostics:
there is no package called 'plyr'
--- failed re-building ‘passt.Rmd’

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

Error: Vignette re-building failed.
Execution halted