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-rw-r--r--gnu/packages/cran.scm2
1 files changed, 2 insertions, 0 deletions
diff --git a/gnu/packages/cran.scm b/gnu/packages/cran.scm
index d0562b998b..dd332cf4d4 100644
--- a/gnu/packages/cran.scm
+++ b/gnu/packages/cran.scm
@@ -12306,6 +12306,8 @@ select colors to use in your R code.")
        ("r-scales" ,r-scales)
        ("r-shiny" ,r-shiny)
        ("r-shinyjs" ,r-shinyjs)))
+    (native-inputs
+     `(("r-knitr" ,r-knitr)))
     (home-page "https://github.com/daattali/ggExtra")
     (synopsis "Marginal histograms for ggplot2 and other enhancements")
     (description