[R-pkg-devel] (no subject)

Error in re-building vignettes:
...
Quitting from lines 24-60 (strider.Rmd)
Error: processing vignette 'strider.Rmd' failed with diagnostics:
package 'dplyr' is not installed for 'arch = x64'
Execution halted

---
title: "The Strider Package"
author: "Timothy H. Keitt"
date: "`r Sys.Date()`"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Vignette Title}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---
```{r include=FALSE}
has_packages = all(c("dplyr", "ggplot2", "microbenchmark") %in%
rownames(installed.packages()))
not_has_packages = !has_packages
```
```{r echo=FALSE, eval=not_has_packages}
cat("Error: You must install dplyr, ggplot2 and microbenchmark to run the
code in this vignette.")
```
```{r include=FALSE, message=FALSE, warning=FALSE, eval=has_packages}
library(dplyr)
library(ggplot2)
library(microbenchmark)
...