--- a/manage.sh
+++ b/manage.sh
@@ -115,8 +115,7 @@ tests() {
 #
 
 npm_path_setup() {
-    which npm || (printf 'Error: npm is not found\n'; exit 1)
-    export PATH="$(npm bin)":$PATH
+    true
 }
 
 npm_packages() {
@@ -138,7 +137,7 @@ npm_packages() {
 build_style() {
     npm_path_setup
 
-    lessc --clean-css="--s1 --advanced --compatibility=ie9" "$BASE_DIR/searx/static/$1" "$BASE_DIR/searx/static/$2"
+    lessc -x "$BASE_DIR/searx/static/$1" "$BASE_DIR/searx/static/$2"
 }
 
 styles() {
@@ -152,8 +151,15 @@ styles() {
     build_style themes/courgette/less/style-rtl.less themes/courgette/css/style-rtl.css
     echo '[!] Building pix-art style'
     build_style themes/pix-art/less/style.less themes/pix-art/css/style.css
-    echo '[!] Building bootstrap style'
-    build_style less/bootstrap/bootstrap.less css/bootstrap.min.css
+    echo '[!] Building simple style'
+    build_style themes/simple/less/style.less themes/simple/css/searx.min.css
+    build_style themes/simple/less/style-rtl.less themes/simple/css/searx-rtl.min.css
+    echo '[!] Building logicodev'
+    build_style themes/oscar/less/logicodev/oscar.less themes/oscar/css/logicodev.min.css
+    echo '[!] Building logicodev-dark'
+    build_style themes/oscar/less/logicodev-dark/oscar.less themes/oscar/css/logicodev-dark.min.css
+    echo '[!] Building pointhi'
+    build_style themes/oscar/less/pointhi/oscar.less themes/oscar/css/pointhi.min.css
 }
 
 grunt_build() {