Extract build.rs

crates/nu-source/Cargo.toml

@@ -18,3 +18,6 @@ nom-tracable = "0.4.1"
 language-reporting = "0.4.0"
 termcolor = "1.0.5"
 pretty = "0.5.2"
+
+[build-dependencies]
+nu-build = { version = "0.1.0", path = "../nu-build" }

crates/nu-source/build.rs

@@ -0,0 +1,3 @@
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    nu_build::build()
+}