diff --git a/NOTES.md b/NOTES.md
index 6f7017b..fe10950 100644
--- a/NOTES.md
+++ b/NOTES.md
@@ -19,3 +19,10 @@ To see if a binary has compressed instructions or not, you can use objdump:
 To dump a ROM without the ELF header:
 
     hut% objdump -b binary -m riscv:rv64 -M no-aliases -D result/u-boot.bin
+
+## Kernel config
+
+```
+$ nix build .\#nixosConfigurations.lagarto-hun.config.system.build.kernel.configfile
+$ nix build .\#nixosConfigurations.lagarto-hun.config.system.build.kernel
+```