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-rw-r--r--gnu/packages/cran.scm1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
index fb41eaf77e..f4f14031af 100644
--- a/gnu/packages/cran.scm
+++ b/gnu/packages/cran.scm
@@ -2585,6 +2585,7 @@ iVAT).")
("r-ggplot2" ,r-ggplot2)
("r-gplots" ,r-gplots)
("r-htmlwidgets" ,r-htmlwidgets)
+ ("r-knitr" ,r-knitr) ; needed for vignettes
("r-magrittr" ,r-magrittr)
("r-plotly" ,r-plotly)
("r-rcolorbrewer" ,r-rcolorbrewer)