diff --git a/horsch/zsh.nix b/horsch/zsh.nix
index 3192e68..ced4a8e 100644
--- a/horsch/zsh.nix
+++ b/horsch/zsh.nix
@@ -18,6 +18,10 @@
       ./kas-container build kas/kas-ttc-image-horsch.yml
     }
 
+    function fu-build-dev {
+      ./kas-container build kas/kas-ttc-image-horsch-dev.yml
+    }
+
     function fu-reboot {
       ssh fusion "reboot"
     }