diff --git a/man/export.Rd b/man/export.Rd
index 4cb41d3..1754f73 100644
--- a/man/export.Rd
+++ b/man/export.Rd
@@ -10,7 +10,7 @@ export(
   ...,
   subdir = "",
   quiet = getOption("shinylive.quiet", !is_interactive()),
-  wasm_packages = TRUE,
+  wasm_packages = NULL,
   package_cache = TRUE,
   max_filesize = NULL,
   assets_version = NULL,
@@ -32,8 +32,11 @@ export(
 \code{shinylive.quiet} option or defaults to \code{FALSE} in interactive sessions if
 not set.}
 
-\item{wasm_packages}{Download and include binary WebAssembly packages as
-part of the output app's static assets. Defaults to \code{TRUE}.}
+\item{wasm_packages}{Download and include binary WebAssembly packages as part
+of the output app's static assets. Logical, defaults to \code{TRUE}. The default
+value can be changed by setting the environment variable
+\code{SHINYLIVE_WASM_PACKAGES} to \code{TRUE} or \code{1} to enable, \code{FALSE} or \code{0} to
+disable.}
 
 \item{package_cache}{Cache downloaded binary WebAssembly packages. Defaults
 to \code{TRUE}.}