diff --git a/src/main.rs b/src/main.rs
index 96d9e63..dc36b94 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -163,6 +163,7 @@ fn get_rustc_packages(target_crates: &[RustcApCrate], dst: &Path) -> Vec<RustcPa
         let mut toml = toml.parse::<toml_edit::Document>().unwrap();
 
         (|| {
+            _ = toml.remove("dev-dependencies");
             let item = &toml
                 .get_mut("features")?
                 .as_table_like_mut()?
@@ -179,9 +180,12 @@ fn get_rustc_packages(target_crates: &[RustcApCrate], dst: &Path) -> Vec<RustcPa
                 }
             }
             for dep in res {
-                toml.get_mut("dependencies")?
-                    .as_table_like_mut()?
-                    .remove(&dep);
+                if let Some(deps) = toml
+                    .get_mut("dependencies")
+                    .and_then(|it| it.as_table_like_mut())
+                {
+                    deps.remove(&dep);
+                }
             }
             Some(())
         })();