vignette not rendering, failing to download package

[swils6]

Here is the error I get when I try to download spiky and dependencies.

E creating vignettes (39s)
--- re-building ‘spiky_vignette.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.
Quitting from lines 122-127 (spiky_vignette.Rmd)
Error: processing vignette 'spiky_vignette.Rmd' failed with diagnostics:
object 'assembly' not found
--- failed re-building ‘spiky_vignette.Rmd’

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

Error: Vignette re-building failed.
Execution halted
Error: Failed to install 'spiky' from GitHub:
System command 'R' failed, exit status: 1, stdout + stderr (last 10 lines):
E> Quitting from lines 122-127 (spiky_vignette.Rmd)
E> Error: processing vignette 'spiky_vignette.Rmd' failed with diagnostics:
E> object 'assembly' not found
E> --- failed re-building ‘spiky_vignette.Rmd’
E>
E> SUMMARY: processing the following file failed:
E> ‘spiky_vignette.Rmd’
E>
E> Error: Vignette re-building failed.
E> Execution halted