diff --git a/Cargo.toml b/Cargo.toml
index 603129a2fc..dbe92f5a4c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -88,3 +88,18 @@ members = [
   "homogeneous",
   "macros",
 ]
+
+# do not optimize proc-macro deps or build scripts
+[profile.dev.build-override]
+codegen-units = 16
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false
+
+[profile.release.build-override]
+codegen-units = 16
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false