Error(s) in re-building vignettes:
--- re-building ‘fastcluster.Rtex’ using Sweave
--- finished re-building ‘fastcluster.Rtex’

make[1]: Entering directory '/data/gannet/ripley/R/packages/tests-clang/fastcluster.Rcheck/vign_test/fastcluster/vignettes'
latex fastcluster.Rtex
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=latex)
 restricted \write18 enabled.
entering extended mode
(./fastcluster.Rtex
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! LaTeX Error: Encoding scheme `PU' unknown.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.4058 \ProcessKeyvalOptions{Hyp}
                                 
? 
! Emergency stop.
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l.4058 \ProcessKeyvalOptions{Hyp}
                                 
No pages of output.
Transcript written on fastcluster.log.
make[1]: *** [Makefile:2: all] Error 1
make[1]: Leaving directory '/data/gannet/ripley/R/packages/tests-clang/fastcluster.Rcheck/vign_test/fastcluster/vignettes'
Error in tools:::buildVignettes(dir = "/data/gannet/ripley/R/packages/tests-clang/fastcluster.Rcheck/vign_test/fastcluster",  : 
  running 'make' failed
Execution halted