diff --git a/src/bsconfig.rs b/src/bsconfig.rs
index f5bf905..17cff89 100644
--- a/src/bsconfig.rs
+++ b/src/bsconfig.rs
@@ -39,7 +39,7 @@ pub fn to_qualified_without_children(s: &Source, sub_path: Option<PathBuf>) -> P
                 .to_string_lossy()
                 .to_string(),
             subdirs: None,
-            type_: None,
+            type_: s.get_type(),
         },
         Source::Qualified(PackageSource {
             dir,
@@ -74,6 +74,31 @@ pub enum Source {
     Shorthand(String),
     Qualified(PackageSource),
 }
+
+impl Source {
+    /// When reading, we should propagate the sources all the way through the tree
+    pub fn get_type(&self) -> Option<String> {
+        match self {
+            Source::Shorthand(_) => None,
+            Source::Qualified(PackageSource { type_, .. }) => type_.clone(),
+        }
+    }
+    pub fn set_type(&self, type_: Option<String>) -> Source {
+        match (self, type_) {
+            (Source::Shorthand(dir), Some(type_)) => Source::Qualified(PackageSource {
+                dir: dir.to_string(),
+                subdirs: None,
+                type_: Some(type_),
+            }),
+            (Source::Qualified(package_source), type_) => Source::Qualified(PackageSource {
+                type_,
+                ..package_source.clone()
+            }),
+            (source, _) => source.clone(),
+        }
+    }
+}
+
 impl Eq for Source {}
 
 #[derive(Deserialize, Debug, Clone)]
@@ -412,6 +437,39 @@ mod tests {
         assert_eq!(config.get_module(), "es6");
     }
 
+    #[test]
+    fn test_sources() {
+        let json = r#"
+        {
+          "name": "@rescript/core",
+          "version": "0.5.0",
+          "sources": {
+              "dir": "test",
+              "subdirs": ["intl"],
+              "type": "dev"
+          },
+          "suffix": ".mjs",
+          "package-specs": {
+            "module": "esmodule",
+            "in-source": true
+          },
+          "bs-dev-dependencies": ["@rescript/tools"],
+          "warnings": {
+            "error": "+101"
+          }
+        }
+        "#;
+
+        let config = serde_json::from_str::<Config>(json).unwrap();
+        if let OneOrMore::Single(source) = config.sources {
+            let source = to_qualified_without_children(&source, None);
+            assert_eq!(source.type_, Some(String::from("dev")));
+        } else {
+            dbg!(config.sources);
+            unreachable!()
+        }
+    }
+
     #[test]
     fn test_detect_gentypeconfig() {
         let json = r#"
@@ -430,7 +488,7 @@ mod tests {
         "#;
 
         let config = serde_json::from_str::<Config>(json).unwrap();
-        assert_eq!(config.gentype_config.is_some(), true);
+        assert!(config.gentype_config.is_some());
         assert_eq!(config.get_gentype_arg(), vec!["-bs-gentype".to_string()]);
     }
 
diff --git a/src/build/packages.rs b/src/build/packages.rs
index 7ecee3e..b50c0c6 100644
--- a/src/build/packages.rs
+++ b/src/build/packages.rs
@@ -184,6 +184,9 @@ pub fn read_folders(
 fn get_source_dirs(source: bsconfig::Source, sub_path: Option<PathBuf>) -> AHashSet<bsconfig::PackageSource> {
     let mut source_folders: AHashSet<bsconfig::PackageSource> = AHashSet::new();
 
+    let source_folder = bsconfig::to_qualified_without_children(&source, sub_path.to_owned());
+    source_folders.insert(source_folder.to_owned());
+
     let (subdirs, full_recursive) = match source.to_owned() {
         bsconfig::Source::Shorthand(_)
         | bsconfig::Source::Qualified(bsconfig::PackageSource { subdirs: None, .. }) => (None, false),
@@ -197,15 +200,12 @@ fn get_source_dirs(source: bsconfig::Source, sub_path: Option<PathBuf>) -> AHash
         }) => (Some(subdirs), false),
     };
 
-    let source_folder = bsconfig::to_qualified_without_children(&source, sub_path.to_owned());
-    source_folders.insert(source_folder.to_owned());
-
     if !full_recursive {
         let sub_path = Path::new(&source_folder.dir).to_path_buf();
         subdirs
             .unwrap_or(vec![])
             .par_iter()
-            .map(|subdir| get_source_dirs(subdir.to_owned(), Some(sub_path.to_owned())))
+            .map(|subsource| get_source_dirs(subsource.set_type(source.get_type()), Some(sub_path.to_owned())))
             .collect::<Vec<AHashSet<bsconfig::PackageSource>>>()
             .into_iter()
             .for_each(|subdir| source_folders.extend(subdir))
@@ -453,12 +453,12 @@ pub fn get_source_files(
     if type_ != &Some("dev".to_string()) {
         match read_folders(filter, package_dir, path_dir, recurse) {
             Ok(files) => map.extend(files),
-            Err(_e) if type_ == &Some("dev".to_string()) => {
-                log::warn!(
-                    "Could not read folder: {}... Probably ok as type is dev",
-                    path_dir.to_string_lossy()
-                )
-            }
+            // Err(_e) if type_ == &Some("dev".to_string()) => {
+            //     log::warn!(
+            //         "Could not read folder: {}... Probably ok as type is dev",
+            //         path_dir.to_string_lossy()
+            //     )
+            // }
             Err(_e) => log::error!(
                 "Could not read folder: {:?}. Specified in dependency: {}, located {:?}...",
                 path_dir.to_path_buf().into_os_string(),