diff --git a/vignettes/teal-modules-general.Rmd b/vignettes/teal-modules-general.Rmd
index e6992fdf7..6969a0695 100644
--- a/vignettes/teal-modules-general.Rmd
+++ b/vignettes/teal-modules-general.Rmd
@@ -88,7 +88,7 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
 
diff --git a/vignettes/using-association-plot.Rmd b/vignettes/using-association-plot.Rmd
index cc1eb58a8..b303ff9b7 100644
--- a/vignettes/using-association-plot.Rmd
+++ b/vignettes/using-association-plot.Rmd
@@ -316,6 +316,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-bivariate-plot.Rmd b/vignettes/using-bivariate-plot.Rmd
index 20f8199b4..a13de8866 100644
--- a/vignettes/using-bivariate-plot.Rmd
+++ b/vignettes/using-bivariate-plot.Rmd
@@ -642,6 +642,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-cross-table.Rmd b/vignettes/using-cross-table.Rmd
index 4d2092193..73c823003 100644
--- a/vignettes/using-cross-table.Rmd
+++ b/vignettes/using-cross-table.Rmd
@@ -159,6 +159,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-data-table.Rmd b/vignettes/using-data-table.Rmd
index a0419a7f4..686f61b14 100644
--- a/vignettes/using-data-table.Rmd
+++ b/vignettes/using-data-table.Rmd
@@ -129,6 +129,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-outliers-module.Rmd b/vignettes/using-outliers-module.Rmd
index d2b6d7993..1d6ca8536 100644
--- a/vignettes/using-outliers-module.Rmd
+++ b/vignettes/using-outliers-module.Rmd
@@ -210,6 +210,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-regression-plots.Rmd b/vignettes/using-regression-plots.Rmd
index cce69ae88..94c8aac14 100644
--- a/vignettes/using-regression-plots.Rmd
+++ b/vignettes/using-regression-plots.Rmd
@@ -289,6 +289,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-response-plot.Rmd b/vignettes/using-response-plot.Rmd
index b73ec9922..f8054e4c8 100644
--- a/vignettes/using-response-plot.Rmd
+++ b/vignettes/using-response-plot.Rmd
@@ -398,6 +398,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-scatterplot-matrix.Rmd b/vignettes/using-scatterplot-matrix.Rmd
index 5b50859a1..c89490ad4 100644
--- a/vignettes/using-scatterplot-matrix.Rmd
+++ b/vignettes/using-scatterplot-matrix.Rmd
@@ -177,6 +177,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```
diff --git a/vignettes/using-scatterplot.Rmd b/vignettes/using-scatterplot.Rmd
index 0dd720404..bd28df325 100644
--- a/vignettes/using-scatterplot.Rmd
+++ b/vignettes/using-scatterplot.Rmd
@@ -393,6 +393,6 @@ url <- roxy.shinylive::create_shinylive_url(code)
 cat(sprintf("[Open in Shinylive](%s)\n\n", url))
 ```
 
-```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && requireNamespace("pkgdown", quietly = TRUE) && getFromNamespace("in_pkgdown", "pkgdown")()}
+```{r shinylive_iframe, echo = FALSE, out.width = '150%', out.extra = 'style = "position: relative; z-index:1"', eval = knitr::is_html_output() && identical(Sys.getenv("IN_PKGDOWN"), "true")}
 knitr::include_url(url, height = "800px")
 ```