diff --git a/compiler/.cargo/config.toml b/compiler/.cargo/config.toml
new file mode 100644
index 0000000000000..23743d83c1726
--- /dev/null
+++ b/compiler/.cargo/config.toml
@@ -0,0 +1,8 @@
+# This file should be kept in sync with the project's Buck flags.
+# See parent PACKAGE.
+
+[build]
+rustflags = [
+    "-Drust-2018-idioms",
+    "-Dwarnings",
+]
diff --git a/compiler/crates/fixture-tests/src/lib.rs b/compiler/crates/fixture-tests/src/lib.rs
index 3a3d9cbfa0b69..f04fe5a47d510 100644
--- a/compiler/crates/fixture-tests/src/lib.rs
+++ b/compiler/crates/fixture-tests/src/lib.rs
@@ -47,8 +47,6 @@
 //! *FB-internal: see `scripts/generate_fixture_tests.sh` to generate all.*
 //
 //! *FB-internal: use buck run //relay/oss/crates/fixture-tests:fixture-tests-bin -- <path to tests dir>
-//! *FB-internal: if you don't want to use cargo run. This is useful for development on a dev-server or
-//! *FB-internal: or machines w/o cargo installed.
 
 mod print_diff;