diff --git a/manage.sh b/manage.sh
index 3bc77fec..a352ccc6 100755
--- a/manage.sh
+++ b/manage.sh
@@ -5,8 +5,6 @@ BASE_DIR="$(dirname -- "`readlink -f -- "$0"`")"
 cd -- "$BASE_DIR"
 set -e
 
-export PATH="$(npm bin)":$PATH
-
 # subshell
 PYTHONPATH="$BASE_DIR"
 SEARX_DIR="$BASE_DIR/searx"
@@ -111,7 +109,14 @@ tests() {
 # Web
 #
 
+npm_path_setup() {
+    which npm || (printf 'Error: npm is not found\n'; exit 1)
+    export PATH="$(npm bin)":$PATH
+}
+
 npm_packages() {
+    npm_path_setup
+
     echo '[!] install NPM packages'
     cd -- "$BASE_DIR"
     npm install less@2.7 less-plugin-clean-css grunt-cli
@@ -126,10 +131,14 @@ npm_packages() {
 }
 
 build_style() {
+    npm_path_setup
+
     lessc --clean-css="--s1 --advanced --compatibility=ie9" "$BASE_DIR/searx/static/$1" "$BASE_DIR/searx/static/$2"
 }
 
 styles() {
+    npm_path_setup
+
     echo '[!] Building legacy style'
     build_style themes/legacy/less/style.less themes/legacy/css/style.css
     build_style themes/legacy/less/style-rtl.less themes/legacy/css/style-rtl.css
diff --git a/searx/static/themes/simple/less/#toolkit_loader.less# b/searx/static/themes/simple/less/#toolkit_loader.less#
deleted file mode 100644
index e69de29b..00000000
diff --git a/searx/static/themes/simple/less/.#toolkit_loader.less b/searx/static/themes/simple/less/.#toolkit_loader.less
deleted file mode 120000
index f9359338..00000000
--- a/searx/static/themes/simple/less/.#toolkit_loader.less
+++ /dev/null
@@ -1 +0,0 @@
-alexandre@alf-laptop.2449:1533915028
\ No newline at end of file