diff --git a/src/binary/command/prebuild.rs b/src/binary/command/prebuild.rs
index 0848572..a03fec1 100644
--- a/src/binary/command/prebuild.rs
+++ b/src/binary/command/prebuild.rs
@@ -21,11 +21,16 @@ impl BinaryCommand for Command {
         for s in site.manifest.prebuild {
             let cmd_parts: Vec<&str> = s.split_whitespace().collect();
             if !cmd_parts.is_empty() {
-                println!("runnning {}", s);
-                std::process::Command::new(cmd_parts[0])
+                println!("runnning {} {}", cmd_parts[0], cmd_parts[1..].join(" "));
+                let status = std::process::Command::new(cmd_parts[0])
                     .args(&cmd_parts[1..])
+                    .current_dir(build_dir)
                     .spawn()
-                    .unwrap_or_else(|_| panic!("command failed: {}", s));
+                    .unwrap_or_else(|_| panic!("spawn failed: {}", s))
+                    .wait()?;
+                if !status.success() {
+                    return Ok(ExitStatus::Error);
+                }
             }
         }
         Ok(ExitStatus::Ok)
diff --git a/src/manifest.rs b/src/manifest.rs
index 1208791..d3c9bfe 100644
--- a/src/manifest.rs
+++ b/src/manifest.rs
@@ -115,9 +115,11 @@ impl Manifest {
                 }
                 "site_url" => manifest.site_url = value.as_str().map(|s| s.to_string()),
                 "prebuild" => {
-                    manifest.prebuild = value
-                        .as_array()
-                        .map_or(vec![], |v| v.iter().map(|s| s.to_string()).collect())
+                    manifest.prebuild = value.as_array().map_or(vec![], |v| {
+                        v.iter()
+                            .map(|s| s.as_str().map_or("".to_string(), |s| s.to_string()))
+                            .collect()
+                    })
                 }
                 "pages" => manifest.pages_dir = path_or_err(value)?,
                 "objects" => manifest.objects_dir = path_or_err(value)?,