diff --git a/crates/turbopack-core/src/source_map/mod.rs b/crates/turbopack-core/src/source_map/mod.rs
index c58b8eb9bfa96..db41d7e920a02 100644
--- a/crates/turbopack-core/src/source_map/mod.rs
+++ b/crates/turbopack-core/src/source_map/mod.rs
@@ -159,6 +159,7 @@ impl TryInto<sourcemap::RawToken> for Token {
                 src_col: t.original_column as u32,
                 src_line: t.original_line as u32,
                 src_id: t.original_file.parse()?,
+                is_range: false,
             },
             Self::Synthetic(t) => sourcemap::RawToken {
                 dst_col: t.generated_column as u32,
@@ -167,6 +168,7 @@ impl TryInto<sourcemap::RawToken> for Token {
                 src_col: SOURCEMAP_CRATE_NONE_U32,
                 src_line: SOURCEMAP_CRATE_NONE_U32,
                 src_id: SOURCEMAP_CRATE_NONE_U32,
+                is_range: false,
             },
         })
     }
@@ -240,7 +242,7 @@ impl SourceMap {
     #[turbo_tasks::function]
     pub fn empty() -> Vc<Self> {
         let mut builder = SourceMapBuilder::new(None);
-        builder.add(0, 0, 0, 0, None, None);
+        builder.add(0, 0, 0, 0, None, None, false);
         SourceMap::new_regular(builder.into_sourcemap()).cell()
     }
 
@@ -389,23 +391,23 @@ impl SourceMap {
         origin: Vc<FileSystemPath>,
     ) -> Result<Vc<Self>> {
         async fn resolve_source(
-            source_request: String,
-            source_content: Option<String>,
+            source_request: Arc<str>,
+            source_content: Option<Arc<str>>,
             origin: Vc<FileSystemPath>,
-        ) -> Result<(String, String)> {
+        ) -> Result<(Arc<str>, Arc<str>)> {
             Ok(
                 if let Some(path) = *origin.parent().try_join(source_request.to_string()).await? {
                     let path_str = path.to_string().await?;
                     let source = format!("/{SOURCE_MAP_ROOT_NAME}/{}", path_str);
                     let source_content = if let Some(source_content) = source_content {
-                        source_content.to_string()
+                        source_content
                     } else if let FileContent::Content(file) = &*path.read().await? {
                         let text = file.content().to_str()?;
-                        text.to_string()
+                        text.to_string().into()
                     } else {
-                        format!("unable to read source {path_str}")
+                        format!("unable to read source {path_str}").into()
                     };
-                    (source, source_content)
+                    (source.into(), source_content)
                 } else {
                     let origin_str = origin.to_string().await?;
                     static INVALID_REGEX: Lazy<Regex> =
@@ -420,8 +422,9 @@ impl SourceMap {
                             "unable to access {source_request} in {origin_str} (it's leaving the \
                              filesystem root)"
                         )
+                        .into()
                     });
-                    (source, source_content)
+                    (source.into(), source_content)
                 },
             )
         }
@@ -430,14 +433,14 @@ impl SourceMap {
             origin: Vc<FileSystemPath>,
         ) -> Result<RegularMap> {
             let map = &map.0;
-            let file = map.get_file().map(ToString::to_string);
+            let file = map.get_file().map(Arc::<str>::from);
             let tokens = map.tokens().map(|t| t.get_raw_token()).collect();
-            let names = map.names().map(ToString::to_string).collect();
+            let names = map.names().map(Arc::<str>::from).collect();
             let count = map.get_source_count() as usize;
-            let sources = map.sources().map(ToString::to_string).collect::<Vec<_>>();
+            let sources = map.sources().map(Arc::<str>::from).collect::<Vec<_>>();
             let source_contents = map
                 .source_contents()
-                .map(|s| s.map(ToString::to_string))
+                .map(|s| s.map(Arc::<str>::from))
                 .collect::<Vec<_>>();
             let mut new_sources = Vec::with_capacity(count);
             let mut new_source_contents = Vec::with_capacity(count);
diff --git a/crates/turbopack-css/src/process.rs b/crates/turbopack-css/src/process.rs
index 8c7c849d8ac0d..36ae1987ac699 100644
--- a/crates/turbopack-css/src/process.rs
+++ b/crates/turbopack-css/src/process.rs
@@ -991,6 +991,7 @@ impl GenerateSourceMap for ParseCssResultSourceMap {
                         m.original.map(|v| v.original_column).unwrap_or_default(),
                         Some(0),
                         None,
+                        false,
                     );
                 }
 
diff --git a/crates/turbopack-tests/tests/snapshot/emotion/emotion/output/crates_turbopack-tests_tests_snapshot_b36339._.js b/crates/turbopack-tests/tests/snapshot/emotion/emotion/output/crates_turbopack-tests_tests_snapshot_b36339._.js
index 3a669289822d5..1bb656791d4e7 100644
--- a/crates/turbopack-tests/tests/snapshot/emotion/emotion/output/crates_turbopack-tests_tests_snapshot_b36339._.js
+++ b/crates/turbopack-tests/tests/snapshot/emotion/emotion/output/crates_turbopack-tests_tests_snapshot_b36339._.js
@@ -12,7 +12,7 @@ var __TURBOPACK__imported__module__$5b$project$5d2f$crates$2f$turbopack$2d$tests
 ;
 ;
 const StyledButton = /*#__PURE__*/ (0, __TURBOPACK__imported__module__$5b$project$5d2f$crates$2f$turbopack$2d$tests$2f$tests$2f$snapshot$2f$node_modules$2f40$emotion$2f$styled$2f$index$2e$js__$5b$test$5d$__$28$ecmascript$29$__["default"])("button", {
-    target: "ekkrg800"
+    target: "ekn3dmj0"
 })("background:blue;");
 function ClassNameButton({ children }) {
     return /*#__PURE__*/ (0, __TURBOPACK__imported__module__$5b$project$5d2f$crates$2f$turbopack$2d$tests$2f$tests$2f$snapshot$2f$node_modules$2f40$emotion$2f$react$2f$jsx$2d$dev$2d$runtime$2e$js__$5b$test$5d$__$28$ecmascript$29$__["jsxDEV"])("button", {