diff --git a/data/category-dev b/data/category-dev
index 3dfaeb48..8f7da818 100644
--- a/data/category-dev
+++ b/data/category-dev
@@ -35,6 +35,7 @@ include:kubernetes
 include:microsoft-dev
 include:mongodb
 include:nginx
+include:nixos
 include:openai
 include:openwrt
 include:osdn
diff --git a/data/nixos b/data/nixos
new file mode 100644
index 00000000..b6b9e4f4
--- /dev/null
+++ b/data/nixos
@@ -0,0 +1 @@
+nixos.org