diff --git a/scripts/xhtmlize-single-file.sh b/scripts/xhtmlize-single-file.sh
index 6a9f155..c9f7ce3 100644
--- a/scripts/xhtmlize-single-file.sh
+++ b/scripts/xhtmlize-single-file.sh
@@ -29,7 +29,7 @@ trap cleanup EXIT
 sed 7d "$html_file" | xmllint --format --encode UTF-8 --noent - | sd '^\t(?:\t)?' '' >"$tmp_file"
 {
 	head -n7 "$tmp_file" | sd -s '/>' ' />'
-	cat tmp.css
+	cat "$OUTPUT_DIR/tmp.css"
 	# shellcheck disable=SC2016 # these are regex statements, not shell expressions
 	tail -n +8 "$tmp_file" \
 		| sd '<pre(?: tabindex="0")?>\n\t*<(code|samp)( |>)' '<pre tabindex="0"><$1$2' \
diff --git a/scripts/xhtmlize.sh b/scripts/xhtmlize.sh
index b5bfd90..7691b79 100644
--- a/scripts/xhtmlize.sh
+++ b/scripts/xhtmlize.sh
@@ -8,12 +8,13 @@ set -e -u
 output_dir="$1"
 script_dir="$(dirname "$0")"
 
-printf '<style>%s</style>\n' "$(htmlq -t style <"$output_dir/index.html")" >tmp.css
+printf '<style>%s</style>\n' "$(htmlq -t style <"$output_dir/index.html")" >"$output_dir/tmp.css"
 cleanup() {
-	rm -f "tmp.css"
+	rm -f "$output_dir/tmp.css"
 }
 trap cleanup EXIT
 
 export XMLLINT_INDENT='	'
+export OUTPUT_DIR="$output_dir"
 find "$output_dir" -type f -name '*.html' | xargs -n1 sh "$script_dir/xhtmlize-single-file.sh"
 # done