From a4773bfd1a799902990419bee5abd7f91b2f64cf Mon Sep 17 00:00:00 2001
From: Matthijs Steen <emailmatthijs@gmail.com>
Date: Sat, 24 Jul 2021 10:47:28 +0200
Subject: [PATCH] fix Darwin for issue #26

---
 src/main.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.sh b/src/main.sh
index 6409507..680e4c7 100755
--- a/src/main.sh
+++ b/src/main.sh
@@ -425,7 +425,7 @@ done
 
 handle_common
 
-[[ $input_type =~ ^(nix|json|shell)?$ ]] || die "Unsupported input type '${input_type}'."
+[[ -z $input_type || $input_type =~ ^(nix|json|shell)$ ]] || die "Unsupported input type '${input_type}'."
 [[ $output_type =~ ^(nix|json|shell|raw)$ ]] || die "Unsupported output type '${output_type}'."
 
 if [[ -v fetcher ]]; then