diff --git a/autoconf/AutoConf.py b/autoconf/AutoConf.py
index e362ec5..31efca2 100644
--- a/autoconf/AutoConf.py
+++ b/autoconf/AutoConf.py
@@ -29,6 +29,10 @@ class AutoConf :
 				env = instance.attrs["Config"]["Env"]
 			for entry in env :
 				self.__env[entry.split("=")[0]] = entry.replace(entry.split("=")[0] + "=", "", 1)
+			blacklist = ["NGINX_VERSION", "NJS_VERSION", "PATH", "PKG_RELEASE"]
+			for entry in blacklist :
+				if entry in self.__env :
+					del self.__env[entry]
 		if not "SERVER_NAME" in self.__env or self.__env["SERVER_NAME"] == "" :
 			self.__env["SERVER_NAME"] = []
 		else :
diff --git a/entrypoint/jobs.sh b/entrypoint/jobs.sh
index f110a70..e787a01 100644
--- a/entrypoint/jobs.sh
+++ b/entrypoint/jobs.sh
@@ -58,7 +58,7 @@ if [ "$files" != "" ] ; then
 		if [ "$EMAIL_LETS_ENCRYPT" = "" ] ; then
 			EMAIL_LETS_ENCRYPT="contact@${FIRST_SERVER}"
 		fi
-		certbot_outpout=$(/opt/scripts/certbot-new.sh "$(echo -n $SERVER_NAME | sed 's/ /,/g')" "$EMAIL_LETS_ENCRYPT" 2>&1)
+		certbot_output=$(/opt/scripts/certbot-new.sh "$(echo -n $SERVER_NAME | sed 's/ /,/g')" "$EMAIL_LETS_ENCRYPT" 2>&1)
 		if [ $? -eq 0 ] ; then
 			echo "[*] Certbot new successfully executed for domain(s) $(echo -n $SERVER_NAME | sed 's/ /,/g')"
 		else
diff --git a/gen/Configurator.py b/gen/Configurator.py
index 3ca4732..db3e1d7 100644
--- a/gen/Configurator.py
+++ b/gen/Configurator.py
@@ -21,10 +21,11 @@ class Configurator :
 
 	def load_variables(self, vars, multisite_only=False) :
 		for var, value in vars.items() :
-			if self.__check_var(var, value) :
+			check, reason = self.__check_var(var, value)
+			if check :
 				self.__variables[var] = value
 			else :
-				print("Ignoring " + var + "=" + value)
+				print("Ignoring " + var + "=" + value + " (" + reason + ")")
 
 	def get_config(self) :
 		config = {}
@@ -45,4 +46,10 @@ class Configurator :
 				real_var = "_".join(var.split("_")[:-1])
 			else :
 				real_var = "_".join(var.split("_")[:-1][1:])
-		return real_var != "" and re.search(self.__settings[real_var]["regex"], value) and (not multisite_only or self.__settings[real_var]["context"] == "multisite")
+		if real_var == "" :
+			return False, "doesn't exist"
+		elif not re.search(self.__settings[real_var]["regex"], value) :
+			return False, "doesn't match regex : " + self.__settings[real_var]["regex"]
+		elif multisite_only and self.__settings[real_var]["context"] != "multisite" :
+			return False, "not at multisite context"
+		return True, ""