diff --git a/horsch/zsh.nix b/horsch/zsh.nix
index 4cc6a3d..407e92b 100644
--- a/horsch/zsh.nix
+++ b/horsch/zsh.nix
@@ -15,11 +15,35 @@
     }
 
     function fu-build {
-      ./kas-container build kas/kas-ttc-image-horsch.yml
+      local fzf_preview='bat --color always --style plain {}'
+
+      kas_file=$(find kas -maxdepth 1 -type f -name "*image*.yml" \
+        | fzf --select-1 --exit-0 --header "Select a image file" --preview ''${fzf_preview})
+
+      if [ -z ''${kas_file} ]; then
+          echo "no file selected"
+          return 1
+      fi
+
+      ./kas-container build ''${kas_file}
     }
 
     function fu-build-dev {
-      ./kas-container build kas/kas-ttc-image-horsch-dev.yml
+      local fzf_preview='bat --color always --style plain {}'
+
+      local kas_file=kas/kas-ttc-image-horsch-dev.yml
+
+      if [ ! -f ''${kas_file} ]; then
+          kas_file=$(find kas -maxdepth 1 -type f -name "*image*.yml" \
+            | fzf --select-1 --exit-0 --header "Select a image file" --preview ''${fzf_preview})
+      fi
+
+      if [ -z ''${kas_file} ]; then
+          echo "no file selected"
+          return 1
+      fi
+
+      ./kas-container build ''${kas_file}
     }
 
     function fu-reboot {