diff --git a/configure_nginx.sh b/configure_nginx.sh
index df2cfc1..d2929a6 100755
--- a/configure_nginx.sh
+++ b/configure_nginx.sh
@@ -5,10 +5,9 @@ export TARGET_HOST=${TARGET_HOST:-proxyapp}
 export CLIENT_MAX_BODY_SIZE=${CLIENT_MAX_BODY_SIZE:-20M}
 export SSL_PORT=${SSL_PORT:-443}
 
-# Hack to avoid breaking nginx.conf
-export host='$host' remote_addr='$remote_addr' proxy_add_x_forwarded_for='$proxy_add_x_forwarded_for' scheme='$scheme' remote_addr='$remote_addr'
+REPLACEABLE='$TARGET_PORT:$TARGET_HOST:$CLIENT_MAX_BODY_SIZE:$SSL_PORT'
 
-envsubst < /nginx.conf.template > /etc/nginx/nginx.conf
+envsubst $REPLACEABLE < /nginx.conf.template > /etc/nginx/nginx.conf
 
 /add_self_signed_certs.sh