manager: Add os variable since hostname on macos is weird

manager/src/main.rs

@@ -10,7 +10,7 @@ use builder::build_tree;
 use error::Errors;
 use linker::link_tree;
 use log::LevelFilter;
-use peeker::peek_tree;
+use peeker::print_variables;
 use std::env;
 use std::path::PathBuf;
 use structopt::StructOpt;
@@ -88,8 +88,8 @@ async fn run() -> Result<(), Errors> {
     };
 
     if opt.print_variables {
-        info!("peeking tree");
-        peek_tree(&cfg).await?;
+        info!("scanning tree");
+        print_variables(&cfg).await?;
     } else {
         info!("building tree");
         build_tree(&cfg).await?;