diff --git a/crates/binstalk-manifests/src/cargo_crates_v1.rs b/crates/binstalk-manifests/src/cargo_crates_v1.rs
index 7be49cb7..f5315682 100644
--- a/crates/binstalk-manifests/src/cargo_crates_v1.rs
+++ b/crates/binstalk-manifests/src/cargo_crates_v1.rs
@@ -99,6 +99,37 @@ impl CratesToml<'_> {
         self.write_to_file(&mut file)
     }
 
+    pub fn append_to_file<'a, Iter>(file: &mut File, iter: Iter) -> Result<(), CratesTomlParseError>
+    where
+        Iter: IntoIterator<Item = &'a CrateInfo>,
+    {
+        fn inner(
+            file: &mut File,
+            iter: &mut dyn Iterator<Item = &CrateInfo>,
+        ) -> Result<(), CratesTomlParseError> {
+            let mut c1 = CratesToml::load_from_reader(&mut *file)?;
+
+            for metadata in iter {
+                let name = &metadata.name;
+                let version = &metadata.current_version;
+                let source = Source::from(&metadata.source);
+
+                c1.remove(name);
+                c1.v1.push((
+                    format!("{name} {version} ({source})"),
+                    Cow::borrowed(&metadata.bins),
+                ));
+            }
+
+            file.rewind()?;
+            c1.write_to_file(file)?;
+
+            Ok(())
+        }
+
+        inner(file, &mut iter.into_iter())
+    }
+
     pub fn append_to_path<'a, Iter>(
         path: impl AsRef<Path>,
         iter: Iter,
@@ -107,28 +138,7 @@ impl CratesToml<'_> {
         Iter: IntoIterator<Item = &'a CrateInfo>,
     {
         let mut file = FileLock::new_exclusive(create_if_not_exist(path.as_ref())?)?;
-        let mut c1 = if file.metadata()?.len() != 0 {
-            Self::load_from_reader(&mut *file)?
-        } else {
-            Self::default()
-        };
-
-        for metadata in iter {
-            let name = &metadata.name;
-            let version = &metadata.current_version;
-            let source = Source::from(&metadata.source);
-
-            c1.remove(name);
-            c1.v1.push((
-                format!("{name} {version} ({source})"),
-                Cow::borrowed(&metadata.bins),
-            ));
-        }
-
-        file.rewind()?;
-        c1.write_to_file(&mut file)?;
-
-        Ok(())
+        Self::append_to_file(&mut file, iter)
     }
 
     pub fn append<'a, Iter>(iter: Iter) -> Result<(), CratesTomlParseError>