diff --git a/bin/pack.sh b/bin/pack.sh
index 7f928e5..4e29002 100755
--- a/bin/pack.sh
+++ b/bin/pack.sh
@@ -4,6 +4,8 @@ cd "$(dirname "$0")/.."
 echo
 echo -e "\033[1;33m[pack]\033[0m"
 
+test -d dist || { echo "[ERROR] No dist folder; please run bin/dist.sh first." 1>&2; exit 1; }
+
 # Download upx as needed, if available for the current platform.
 if [ ! -d .upx ]
 then