diff --git a/src/command/build/render.rs b/src/command/build/render.rs
index 0324619..3df81cc 100644
--- a/src/command/build/render.rs
+++ b/src/command/build/render.rs
@@ -30,21 +30,22 @@ impl SiteRenderer {
     pub(crate) async fn render_blog_posts(&self) -> Result<(), CustomError> {
         let mut renderer_integration = DusterRenderer::new();
 
-        let (main_template, other_templates): (Vec<_>, Vec<_>) = MAIN_TEMPLATES
+        let sources: Vec<_> = MAIN_TEMPLATES
             .files()
             .filter(|f| f.path().extension() == Some(OsStr::new("dust")))
-            .partition(|f| f.path().file_stem() == Some(OsStr::new("main")));
-        if main_template.len() != 1 {
+            .collect();
+        if sources
+            .iter()
+            .filter(|f| f.path().file_stem() == Some(OsStr::new("main")))
+            .count()
+            != 1
+        {
             return Err("Expect exactly 1 main.dust template file.".into());
         }
 
         let decoded_templates = {
-            let mut decoded_templates =
-                Vec::with_capacity(main_template.len() + other_templates.len());
-            for entry in main_template {
-                decoded_templates.push(build_name_contents_pairs(entry)?);
-            }
-            for entry in other_templates {
+            let mut decoded_templates = Vec::with_capacity(sources.len());
+            for entry in sources {
                 decoded_templates.push(build_name_contents_pairs(entry)?);
             }
             decoded_templates