Error(s) in re-building vignettes:
  ...
--- re-building ‘qpAdm.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
ADMIXTOOLS programs required by admixr are not in your $PATH variable.
At the very least, the following programs should be available:
    qp3Pop, qpDstat, qpF4ratio, qpAdm, qpWave
Make sure to modify the $PATH variable in your .Renviron file so 
that it points to the directory containing the ADMIXTOOLS programs.

sh: qpAdm:  not found
sh: qpAdm:  not found
Quitting from lines 165-174 (qpAdm.Rmd) 
Error: processing vignette 'qpAdm.Rmd' failed with diagnostics:
subscript out of bounds
--- failed re-building ‘qpAdm.Rmd’

--- re-building ‘tutorial.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
ADMIXTOOLS programs required by admixr are not in your $PATH variable.
At the very least, the following programs should be available:
    qp3Pop, qpDstat, qpF4ratio, qpAdm, qpWave
Make sure to modify the $PATH variable in your .Renviron file so 
that it points to the directory containing the ADMIXTOOLS programs.

── Attaching packages ─────────────────────────────────────── tidyverse 1.3.0 ──
✔ ggplot2 3.3.2     ✔ purrr   0.3.4
✔ tibble  3.0.1     ✔ dplyr   1.0.0
✔ tidyr   1.1.0     ✔ stringr 1.4.0
✔ readr   1.3.1     ✔ forcats 0.5.0
── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
✖ dplyr::filter() masks stats::filter()
✖ dplyr::lag()    masks stats::lag()
sh: column:  not found
Quitting from lines 145-146 (tutorial.Rmd) 
Error: processing vignette 'tutorial.Rmd' failed with diagnostics:
error in running command: 'Illegal seek'
--- failed re-building ‘tutorial.Rmd’

SUMMARY: processing the following files failed:
  ‘qpAdm.Rmd’ ‘tutorial.Rmd’

Error: Vignette re-building failed.
Execution halted