Fix linux build

kpcli/src/printers.rs

@@ -4,6 +4,9 @@ use std::collections::HashMap;
 use std::fmt::Display;
 use time::OffsetDateTime;
 
+#[cfg(target_os = "linux")]
+use dbus::arg::{self, RefArg};
+
 pub struct PrintableConversation {
     pub guid: String,
     pub date: OffsetDateTime,