From b0bfbf147a720e1a3ea6a2450774ea130d388be1 Mon Sep 17 00:00:00 2001
From: _cry64 <them@dobutterfliescry.net>
Date: Sun, 29 Mar 2026 00:01:11 +1000
Subject: [PATCH] add cfg(nightly) attribute

---
 nixide/build.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 nixide/build.rs

diff --git a/nixide/build.rs b/nixide/build.rs
new file mode 100644
index 0000000..c34d709
--- /dev/null
+++ b/nixide/build.rs
@@ -0,0 +1,15 @@
+use std::env;
+
+fn main() {
+    // allow the `cfg(nightly)` attribute
+    println!("cargo::rustc-check-cfg=cfg(nightly)");
+
+    // NOTE: This allows nixide to conditionally compile based
+    // NOTE: whether a user has access to nightly features.
+    if let Ok(toolchain) = env::var("RUSTUP_TOOLCHAIN")
+        && toolchain.contains("nightly")
+    {
+        // enable the `nightly` flag
+        println!("cargo::rustc-cfg=nightly");
+    }
+}