diff --git a/entrypoint.sh b/entrypoint.sh
index da48f30..cbba054 100644
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 # Setup auth
 echo '{"auths":{"'"$(printf "%s" "$INPUT_REGISTRY")"'":{"auth":"'"$(printf "%s" "$INPUT_CREDENTIAL" | base64 | tr -d '\n')"'"}}}' > /kaniko/.docker/config.json
@@ -8,11 +8,11 @@ if [ -n "$INPUT_WORKDIR" ]; then
     printf 'cd %s -> %s\n' "$OLDPWD" "$PWD"
 fi
 
-options=()
+context_flag=""
 if [ -n "$INPUT_CONTEXT" ]; then
-    options+=('--context')
-    options+=("$INPUT_CONTEXT")
+    context_flag="--context"
+    context_flag_val="$INPUT_CONTEXT"
 fi
 
 # Build container
-/kaniko/executor --dockerfile "$INPUT_DOCKERFILE" --destination "$INPUT_REGISTRY/$INPUT_IMAGE" "${options[@]}"
+/kaniko/executor --dockerfile "$INPUT_DOCKERFILE" --destination "$INPUT_REGISTRY/$INPUT_IMAGE" "$context_flag" "$context_flag_val"