manpath and permissions

install.sh

@@ -17,8 +17,10 @@ cp ./lib/* /usr/lib/lch
 chmod 755 /usr/bin/lch
 echo " Copied lch in /usr/bin"
 
-if [ -z "$MANPATH" ];then
+if [ -z "$MANPATH" ] && [ $(manpath 2> /dev/null) ];then
   MANPATH=$(manpath)
+else
+  MANPATH="/usr/local/man"
 fi
 
 MANDIR=${MANPATH%%:*}/man1