diff --git a/ector/build.rs b/ector/build.rs
new file mode 100644
index 0000000..dc2fee5
--- /dev/null
+++ b/ector/build.rs
@@ -0,0 +1,5 @@
+fn main() {
+	if std::env::var_os("CARGO_FEATURE_NIGHTLY").is_some() {
+		println!("cargo:rustc-cfg=nightly");
+	}
+}
diff --git a/macros/Cargo.toml b/macros/Cargo.toml
index 0b76ed8..b954d11 100644
--- a/macros/Cargo.toml
+++ b/macros/Cargo.toml
@@ -22,3 +22,4 @@ proc-macro2 = "1.0"
 
 [features]
 std = []
+nightly = []
diff --git a/macros/src/lib.rs b/macros/src/lib.rs
index fb4c74c..45aaceb 100644
--- a/macros/src/lib.rs
+++ b/macros/src/lib.rs
@@ -1,4 +1,6 @@
 #![allow(incomplete_features)]
+#![cfg(feature = "nightly")]
+#![feature(proc_macro_diagnostic)]
 
 extern crate proc_macro;
 mod actor;