Update

config/init.nu

@@ -133,9 +133,9 @@ let light_theme = {
 }
 
 # External completer example
-# let carapace_completer = {|spans|
-#     carapace $spans.0 nushell $spans | from json
-# }
+let carapace_completer = {|spans|
+    carapace $spans.0 nushell $spans | from json
+}
 
 # The default config record. This is where much of your global configuration is setup.
 $env.config = {
@@ -206,7 +206,7 @@ $env.config = {
         external: {
             enable: true # set to false to prevent nushell looking into $env.PATH to find more suggestions, `false` recommended for WSL users as this look up may be very slow
             max_results: 100 # setting it lower can improve completion performance at the cost of omitting some options
-            completer: null # check 'carapace_completer' above as an example
+            completer: $carapace_completer # check 'carapace_completer' above as an example
         }
     }
 

env.nu

@@ -46,7 +46,7 @@ def create_left_prompt [] {
 
     # Hostname
     let hostname_color = ansi green_bold
-    let hostname = (sys).host.hostname
+    let hostname = (sys host).hostname
 
     # Current director
     let dir_color = ansi blue_bold