From 6903c10e083d5301aa33535b781aab40be5c869f Mon Sep 17 00:00:00 2001
From: Tobias Gurtzick <magic@wizardtales.com>
Date: Sun, 27 Aug 2017 00:00:03 +0200
Subject: [PATCH] remove double brackets

---
 nvm.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nvm.sh b/nvm.sh
index 2c4112c..3b618f1 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -2111,13 +2111,13 @@ nvm_die_on_prefix() {
   for npmrc in $npmrcs; do
     if [ -f "${npmrc}/.npmrc" ]; then
       NVM_NPM_PREFIX=$(grep ^prefix= ${npmrc}/.npmrc | sed s/prefix=\\\(.*\\\)$/\\1/)
-      if [[ -n $NVM_NPM_PREFIX ]]; then
+      if ! [ -z $NVM_NPM_PREFIX ]; then
         break
       fi
     fi
   done
 
-  if [[ -n $NVM_NPM_PREFIX ]]; then
+  if ! [ -z $NVM_NPM_PREFIX ]; then
     if ! (nvm_tree_contains_path "$NVM_DIR" "$NVM_NPM_PREFIX" >/dev/null 2>&1); then
       if [ "_$NVM_DELETE_PREFIX" = "_1" ]; then
         npm config --loglevel=warn delete prefix