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

Attaching package: 'ssdtools'

The following objects are masked from 'package:stats':

    dgamma, dweibull, pgamma, pweibull, qgamma, qweibull, rgamma,
    rweibull

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'distributions.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘distributions.Rmd’

--- re-building ‘exposure-plots.Rmd’ using rmarkdown

Attaching package: 'ssdtools'

The following objects are masked from 'package:stats':

    dgamma, dweibull, pgamma, pweibull, qgamma, qweibull, rgamma,
    rweibull

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'exposure-plots.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘exposure-plots.Rmd’

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

Attaching package: 'ssdtools'

The following objects are masked from 'package:stats':

    dgamma, dweibull, pgamma, pweibull, qgamma, qweibull, rgamma,
    rweibull


Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'faqs.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘faqs.Rmd’

--- re-building ‘small-sample-bias-ref.Rmd’ using rmarkdown
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'small-sample-bias-ref.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘small-sample-bias-ref.Rmd’

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

Attaching package: 'ssdtools'

The following objects are masked from 'package:stats':

    dgamma, dweibull, pgamma, pweibull, qgamma, qweibull, rgamma,
    rweibull

dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'ssdtools.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘ssdtools.Rmd’

--- re-building ‘small-sample-bias.pdf.asis’ using asis
--- finished re-building ‘small-sample-bias.pdf.asis’

SUMMARY: processing the following files failed:
  ‘distributions.Rmd’ ‘exposure-plots.Rmd’ ‘faqs.Rmd’
  ‘small-sample-bias-ref.Rmd’ ‘ssdtools.Rmd’

Error: Vignette re-building failed.
Execution halted