diff --git a/src/lib.rs b/src/lib.rs
index 9155a2f..dd7238a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,8 +10,7 @@ use {
 mod source_reader;
 
 struct ShaderModule {
-    source_file: source_reader::SourceFile,
-    naga_module: naga::Module,
+    source_file: source_reader::SourceMap,
 }
 
 impl ShaderModule {
@@ -21,7 +20,7 @@ impl ShaderModule {
     ) -> Result<Self, Error> {
         let source_file = source_reader::read_source_file(source_dir, source_filename)?;
 
-        let naga_module = wgsl::parse_str(&source_file.full_text()).map_err(|err| {
+        let _naga_module = wgsl::parse_str(&source_file.full_text()).map_err(|err| {
             if let Some(location) = err.location(&source_file.full_text()) {
                 let (inner_source_filename, inner_line_num) =
                     source_file.map_source_line_num(location.line_number as usize);
@@ -42,7 +41,6 @@ impl ShaderModule {
         })?;
         Ok(Self {
             source_file,
-            naga_module,
         })
     }