diff --git a/README.md b/README.md
index d8d9e77..10f638e 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,16 @@
 # JeremyStarTM's optimized kernel
 This repositories includes everything you need to build JeremyStarTM's custom optimized kernel, based on Clear Linux's kernel patches and various other tweaks introduced by JeremyStarTM.
+## Warning
+As with every other software, make sure to update your kernel regularily. Missing updates and security patches make your system vulnerable. So run `git pull` and then `buildtool.sh` regularily, thank you ^^
 
 ## Building
 To build this kernel, run this command in your terminal:
 ```bash
 curl -sSL "https://git.staropensource.de/JeremyStarTM/kernel-optimized/raw/branch/develop/buildtool.sh">/tmp/buildtool.sh;chmod +x /tmp/buildtool.sh;/tmp/buildtool.sh
 ```
+
+## Building from local repository
+If you've already built this kernel or want to build it again without starting from scratch execute this:
+```bash
+env BUILDTOOL_LOCALDIR=SET ./buildtool.sh
+```