diff --git a/Makefile b/Makefile
index 7a952a7..a5cfacd 100644
--- a/Makefile
+++ b/Makefile
@@ -130,10 +130,10 @@ build-cran:
 favicons: ${favicons}
 
 export-favicon = \
-	@sz=$$(sed 's/.*x\([[:digit:]]*\)\.png/\1/' <<<"$@") \
-	&& set -x; \
+	@sz=$$(echo "$@" | sed 's/.*x\([[:digit:]]*\)\.png/\1/'); \
 	inkscape -w $$sz -h $$sz --export-area $1 --export-filename=${@D}/tmp-${@F} $< \
-	&& pngcrush -q ${@D}/tmp-${@F} $@ && rm ${@D}/tmp-${@F}
+	&& pngcrush -q ${@D}/tmp-${@F} $@ \
+	&& ${RM} ${@D}/tmp-${@F}
 
 ${favicons_small}: figures/logo.svg | pkgdown/favicon
 	$(call export-favicon,-11:1000:181:1192)
diff --git a/R/unload.r b/R/unload.r
index cdf63f4..b225ac6 100644
--- a/R/unload.r
+++ b/R/unload.r
@@ -153,10 +153,18 @@ purge_cache = function () {
 
 #' @keywords internal
 unload_mod = function (mod_ns, info) {
+    UseMethod('unload_mod', info)
+}
+
+`unload_mod.box$mod_info` = function (mod_ns, info) {
     call_hook(mod_ns, '.on_unload', mod_ns)
     deregister_mod(info)
 }
 
+`unload_mod.box$pkg_info` = function (mod_ns, info) {
+    invisible(NULL)
+}
+
 #' @keywords internal
 unload_mod_recursive = function (mod_ns, info) {
     UseMethod('unload_mod_recursive')
diff --git a/pkgdown/_pkgdown.yml b/pkgdown/_pkgdown.yml
index eeee535..dd17071 100644
--- a/pkgdown/_pkgdown.yml
+++ b/pkgdown/_pkgdown.yml
@@ -49,8 +49,6 @@ navbar:
           href: articles/contributing.html
         - text: Module environments
           href: articles/mod-envs.html
-        - text: Module access benchmark
-          href: articles/extract-benchmark.html
 
 template:
   bootstrap: 5
diff --git a/vignettes/extract-benchmark.rmd b/vignettes/extract-benchmark.rmd.skip
similarity index 100%
rename from vignettes/extract-benchmark.rmd
rename to vignettes/extract-benchmark.rmd.skip