--- a/debian/postinst	Wed Aug 12 20:20:48 2015 +0200
+++ b/debian/postinst	Wed Aug 12 20:25:19 2015 +0200
@@ -28,10 +28,11 @@
     rm -f $tmp
 }
 
-add_sshd_env() {
-    var="$1"
+need_sshd_env() {
+    tmp="$1"
+    var="$2"
     grep -q '^AcceptEnv[[:space:]]\+.*\<'"$var"'\>' /etc/ssh/sshd_config \
-	|| echo "AcceptEnv $var" >> /etc/ssh/sshd_config
+	|| echo "AcceptEnv $var" >> $tmp
 }
 
 update_sshd_config() {