deb: fix runtime usage for chroot

src/deb/mod.rs

@@ -17,7 +17,7 @@ pub enum BuildMode {
 }
 
 /// Build package in 'cwd' to a .deb
-pub fn build_binary_package(
+pub async fn build_binary_package(
     arch: Option<&str>,
     series: Option<&str>,
     cwd: Option<&Path>,
@@ -49,7 +49,7 @@ pub fn build_binary_package(
 
     // Create an ephemeral unshare context for all Local builds
     let mut guard = if mode == BuildMode::Local {
-        Some(ephemeral::EphemeralContextGuard::new(series)?)
+        Some(ephemeral::EphemeralContextGuard::new(series).await?)
     } else {
         None
     };
@@ -227,6 +227,7 @@ mod tests {
 
         log::info!("Starting binary package build...");
         crate::deb::build_binary_package(arch, Some(series), Some(&cwd), cross, None)
+            .await
             .expect("Cannot build binary package (deb)");
         log::info!("Successfully built binary package");